698431261284 has 135 divisors (see below), whose sum is σ = 1892150070811. Its totient is φ = 224642073600.

The previous prime is 698431261279. The next prime is 698431261289. The reversal of 698431261284 is 482162134896.

The square root of 698431261284 is 835722.

It is a perfect power (a square), and thus also a powerful number.

698431261284 is a `hidden beast` number, since 6 + 9 + 8 + 4 + 3 + 12 + 612 + 8 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (698431261279) and next prime (698431261289).

It can be written as a sum of positive squares in 4 ways, for example, as 331340686884 + 367090574400 = 575622^2 + 605880^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 698431261284.

It is not an unprimeable number, because it can be changed into a prime (698431261289) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 436246084 + ... + 436247684.

Almost surely, 2^698431261284 is an apocalyptic number.

698431261284 is the 835722-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698431261284

698431261284 is an abundant number, since it is smaller than the sum of its proper divisors (1193718809527).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698431261284 is an equidigital number, since it uses as much as digits as its factorization.

698431261284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276 (or 1635 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 698431261284 in words is "six hundred ninety-eight billion, four hundred thirty-one million, two hundred sixty-one thousand, two hundred eighty-four".