612779904 has 256 divisors, whose sum is σ = 2007360000. Its totient is φ = 184757760.

The previous prime is 612779873. The next prime is 612779911. The reversal of 612779904 is 409977216.

It is a self number, because there is not a number n which added to its sum of digits gives 612779904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3079197 + ... + 3079395.

It is an arithmetic number, because the mean of its divisors is an integer number (7841250).

Almost surely, 2^612779904 is an apocalyptic number.

612779904 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 612779904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003680000).

612779904 is an abundant number, since it is smaller than the sum of its proper divisors (1394580096).

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

612779904 is an equidigital number, since it uses as much as digits as its factorization.

612779904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 612779904 is about 24754.3916103790. The cubic root of 612779904 is about 849.3789715178.

The spelling of 612779904 in words is "six hundred twelve million, seven hundred seventy-nine thousand, nine hundred four".