609251904 has 84 divisors (see below), whose sum is σ = 1772487184. Its totient is φ = 200040192.

The previous prime is 609251813. The next prime is 609251921. The reversal of 609251904 is 409152906.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30699 + ... + 46485.

Almost surely, 2^609251904 is an apocalyptic number.

609251904 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 609251904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886243592).

609251904 is an abundant number, since it is smaller than the sum of its proper divisors (1163235280).

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

609251904 is a wasteful number, since it uses less digits than its factorization.

609251904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15872 (or 15859 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 609251904 is about 24683.0286634359. The cubic root of 609251904 is about 847.7457704731.

The spelling of 609251904 in words is "six hundred nine million, two hundred fifty-one thousand, nine hundred four".