315142440 has 64 divisors (see below), whose sum is σ = 946598400. Its totient is φ = 83933952.

The previous prime is 315142433. The next prime is 315142453. The reversal of 315142440 is 44241513.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 315142440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178281 + ... + 180039.

It is an arithmetic number, because the mean of its divisors is an integer number (14790600).

Almost surely, 2^315142440 is an apocalyptic number.

315142440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

315142440 is an abundant number, since it is smaller than the sum of its proper divisors (631455960).

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

315142440 is a wasteful number, since it uses less digits than its factorization.

315142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266 (or 3262 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 315142440 is about 17752.2516881662. The cubic root of 315142440 is about 680.5117543291.

Adding to 315142440 its reverse (44241513), we get a palindrome (359383953).

The spelling of 315142440 in words is "three hundred fifteen million, one hundred forty-two thousand, four hundred forty".