7131904 has 36 divisors (see below), whose sum is σ = 15338176. Its totient is φ = 3290112.

The previous prime is 7131899. The next prime is 7131923. The reversal of 7131904 is 4091317.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2257 + ... + 4399.

Almost surely, 2^7131904 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 7131904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7669088).

7131904 is an abundant number, since it is smaller than the sum of its proper divisors (8206272).

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

7131904 is a wasteful number, since it uses less digits than its factorization.

7131904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 7131904 is about 2670.5624875670. The cubic root of 7131904 is about 192.4871886678.

The spelling of 7131904 in words is "seven million, one hundred thirty-one thousand, nine hundred four".