1320236900 has 36 divisors (see below), whose sum is σ = 2934799140. Its totient is φ = 515212800.

The previous prime is 1320236899. The next prime is 1320236903. The reversal of 1320236900 is 96320231.

It can be written as a sum of positive squares in 6 ways, for example, as 445378816 + 874858084 = 21104^2 + 29578^2 .

It is a super-2 number, since 2×1320236900² = 3486050944243220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320236900.

It is not an unprimeable number, because it can be changed into a prime (1320236903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156905 + ... + 165104.

Almost surely, 2^1320236900 is an apocalyptic number.

1320236900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320236900 is an abundant number, since it is smaller than the sum of its proper divisors (1614562240).

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

1320236900 is a wasteful number, since it uses less digits than its factorization.

1320236900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322064 (or 322057 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1320236900 is about 36335.0643318544. The cubic root of 1320236900 is about 1097.0269303324.

The spelling of 1320236900 in words is "one billion, three hundred twenty million, two hundred thirty-six thousand, nine hundred".