1390256315 has 32 divisors (see below), whose sum is σ = 2061265920. Its totient is φ = 878719104.

The previous prime is 1390256293. The next prime is 1390256327. The reversal of 1390256315 is 5136520931.

It is a cyclic number.

It is not a de Polignac number, because 1390256315 - 2⁶ = 1390256251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3647 + ... + 52856.

It is an arithmetic number, because the mean of its divisors is an integer number (64414560).

Almost surely, 2^1390256315 is an apocalyptic number.

1390256315 is a deficient number, since it is larger than the sum of its proper divisors (671009605).

1390256315 is a wasteful number, since it uses less digits than its factorization.

1390256315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56571.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 1390256315 is about 37286.1410580392. The cubic root of 1390256315 is about 1116.0876234070.

The spelling of 1390256315 in words is "one billion, three hundred ninety million, two hundred fifty-six thousand, three hundred fifteen".