312399072 has 96 divisors (see below), whose sum is σ = 964807200. Its totient is φ = 98002944.

The previous prime is 312399067. The next prime is 312399097. The reversal of 312399072 is 270993213.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×312399072² = 195186360372922368, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4054 + ... + 25322.

It is an arithmetic number, because the mean of its divisors is an integer number (10050075).

Almost surely, 2^312399072 is an apocalyptic number.

312399072 is a gapful number since it is divisible by the number (32) 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 312399072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482403600).

312399072 is an abundant number, since it is smaller than the sum of its proper divisors (652408128).

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

312399072 is a wasteful number, since it uses less digits than its factorization.

312399072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21305 (or 21291 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 312399072 is about 17674.8146242047. The cubic root of 312399072 is about 678.5313400847.

The spelling of 312399072 in words is "three hundred twelve million, three hundred ninety-nine thousand, seventy-two".