694296864 has 144 divisors (see below), whose sum is σ = 2111349240. Its totient is φ = 215654400.

The previous prime is 694296857. The next prime is 694296893. The reversal of 694296864 is 468692496.

It can be written as a sum of positive squares in 4 ways, for example, as 524776464 + 169520400 = 22908^2 + 13020^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 694296864.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 533014 + ... + 534314.

Almost surely, 2^694296864 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 694296864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055674620).

694296864 is an abundant number, since it is smaller than the sum of its proper divisors (1417052376).

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

694296864 is a wasteful number, since it uses less digits than its factorization.

694296864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443 (or 1432 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 694296864 is about 26349.5135438968. The cubic root of 694296864 is about 885.4860721583.

The spelling of 694296864 in words is "six hundred ninety-four million, two hundred ninety-six thousand, eight hundred sixty-four".