694427904 has 189 divisors, whose sum is σ = 2112892509. Its totient is φ = 227681280.

The previous prime is 694427897. The next prime is 694427911. The reversal of 694427904 is 409724496.

The square root of 694427904 is 26352.

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

It is an interprime number because it is at equal distance from previous prime (694427897) and next prime (694427911).

It can be written as a sum of positive squares in only one way, i.e., 22581504 + 671846400 = 4752^2 + 25920^2 .

It is a super-2 number, since 2×694427904² = 964460227707666432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 694427904.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 11384034 + ... + 11384094.

Almost surely, 2^694427904 is an apocalyptic number.

694427904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

694427904 is the 26352-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694427904

694427904 is an abundant number, since it is smaller than the sum of its proper divisors (1418464605).

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

694427904 is an frugal number, since it uses more digits than its factorization.

694427904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The cubic root of 694427904 is about 885.5417768583.

The spelling of 694427904 in words is "six hundred ninety-four million, four hundred twenty-seven thousand, nine hundred four".