312421440 has 56 divisors (see below), whose sum is σ = 991941120. Its totient is φ = 83312128.

The previous prime is 312421433. The next prime is 312421453. The reversal of 312421440 is 44124213.

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, 161760 + ... + 163679.

Almost surely, 2^312421440 is an apocalyptic number.

312421440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312421440 is an abundant number, since it is smaller than the sum of its proper divisors (679519680).

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

312421440 is a wasteful number, since it uses less digits than its factorization.

312421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325459 (or 325449 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 312421440 is about 17675.4473776479. The cubic root of 312421440 is about 678.5475341434.

Adding to 312421440 its reverse (44124213), we get a palindrome (356545653).

The spelling of 312421440 in words is "three hundred twelve million, four hundred twenty-one thousand, four hundred forty".