312242644 has 24 divisors (see below), whose sum is σ = 624897728. Its totient is φ = 133729920.

The previous prime is 312242537. The next prime is 312242657. The reversal of 312242644 is 446242213.

It is a super-2 number, since 2×312242644² = 194990937464221472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57052 + ... + 62284.

Almost surely, 2^312242644 is an apocalyptic number.

It is an amenable number.

312242644 is an abundant number, since it is smaller than the sum of its proper divisors (312655084).

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

312242644 is a wasteful number, since it uses less digits than its factorization.

312242644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375 (or 7373 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 312242644 is about 17670.3889034735. The cubic root of 312242644 is about 678.4180672114.

Adding to 312242644 its reverse (446242213), we get a palindrome (758484857).

The spelling of 312242644 in words is "three hundred twelve million, two hundred forty-two thousand, six hundred forty-four".