130728900 has 36 divisors (see below), whose sum is σ = 378243152. Its totient is φ = 34860960.

The previous prime is 130728887. The next prime is 130728931. The reversal of 130728900 is 9827031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217582 + ... + 218181.

Almost surely, 2^130728900 is an apocalyptic number.

130728900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130728900 is an abundant number, since it is smaller than the sum of its proper divisors (247514252).

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

130728900 is a wasteful number, since it uses less digits than its factorization.

130728900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435780 (or 435773 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 130728900 is about 11433.6739502226. The cubic root of 130728900 is about 507.5247223593.

The spelling of 130728900 in words is "one hundred thirty million, seven hundred twenty-eight thousand, nine hundred".