1331490256 has 20 divisors (see below), whose sum is σ = 2580672004. Its totient is φ = 665510400.

The previous prime is 1331490241. The next prime is 1331490283. The reversal of 1331490256 is 6520941331.

It can be written as a sum of positive squares in 2 ways, for example, as 201185856 + 1130304400 = 14184^2 + 33620^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37816 + ... + 63976.

Almost surely, 2^1331490256 is an apocalyptic number.

1331490256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1331490256 is a deficient number, since it is larger than the sum of its proper divisors (1249181748).

1331490256 is a wasteful number, since it uses less digits than its factorization.

1331490256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29350 (or 29344 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1331490256 is about 36489.5910637541. The cubic root of 1331490256 is about 1100.1350401706.

The spelling of 1331490256 in words is "one billion, three hundred thirty-one million, four hundred ninety thousand, two hundred fifty-six".