612579904 has 56 divisors (see below), whose sum is σ = 1303568640. Its totient is φ = 284583936.

The previous prime is 612579901. The next prime is 612579911. The reversal of 612579904 is 409975216.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (612579901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82389 + ... + 89515.

Almost surely, 2^612579904 is an apocalyptic number.

612579904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612579904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651784320).

612579904 is an abundant number, since it is smaller than the sum of its proper divisors (690988736).

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

612579904 is a wasteful number, since it uses less digits than its factorization.

612579904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235 (or 7225 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 612579904 is about 24750.3515934623. The cubic root of 612579904 is about 849.2865542795.

The spelling of 612579904 in words is "six hundred twelve million, five hundred seventy-nine thousand, nine hundred four".