312545440 has 48 divisors (see below), whose sum is σ = 777258720. Its totient is φ = 118437120.

The previous prime is 312545437. The next prime is 312545447. The reversal of 312545440 is 44545213.

It is a junction number, because it is equal to n+sod(n) for n = 312545399 and 312545408.

It is not an unprimeable number, because it can be changed into a prime (312545447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48366 + ... + 54445.

It is an arithmetic number, because the mean of its divisors is an integer number (16192890).

Almost surely, 2^312545440 is an apocalyptic number.

It is an amenable number.

312545440 is an abundant number, since it is smaller than the sum of its proper divisors (464713280).

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

312545440 is a wasteful number, since it uses less digits than its factorization.

312545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102845 (or 102837 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 312545440 is about 17678.9547202316. The cubic root of 312545440 is about 678.6372940577.

The spelling of 312545440 in words is "three hundred twelve million, five hundred forty-five thousand, four hundred forty".