312290328 has 96 divisors (see below), whose sum is σ = 939610800. Its totient is φ = 86139648.

The previous prime is 312290291. The next prime is 312290347. The reversal of 312290328 is 823092213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 312290295 and 312290304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29526 + ... + 38682.

Almost surely, 2^312290328 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 312290328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469805400).

312290328 is an abundant number, since it is smaller than the sum of its proper divisors (627320472).

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

312290328 is a wasteful number, since it uses less digits than its factorization.

312290328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209 (or 9198 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 312290328 is about 17671.7381148545. The cubic root of 312290328 is about 678.4526002272.

The spelling of 312290328 in words is "three hundred twelve million, two hundred ninety thousand, three hundred twenty-eight".