690848784 has 80 divisors (see below), whose sum is σ = 1987640640. Its totient is φ = 229743360.

The previous prime is 690848783. The next prime is 690848831. The reversal of 690848784 is 487848096.

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

It is a self number, because there is not a number n which added to its sum of digits gives 690848784.

It is not an unprimeable number, because it can be changed into a prime (690848783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210484 + ... + 213740.

It is an arithmetic number, because the mean of its divisors is an integer number (24845508).

Almost surely, 2^690848784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690848784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993820320).

690848784 is an abundant number, since it is smaller than the sum of its proper divisors (1296791856).

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

690848784 is a wasteful number, since it uses less digits than its factorization.

690848784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765 (or 3753 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 690848784 is about 26284.0024349413. The cubic root of 690848784 is about 884.0177784212.

The spelling of 690848784 in words is "six hundred ninety million, eight hundred forty-eight thousand, seven hundred eighty-four".