130279720 has 32 divisors (see below), whose sum is σ = 293495400. Its totient is φ = 52046848.

The previous prime is 130279717. The next prime is 130279733. The reversal of 130279720 is 27972031.

It can be written as a sum of positive squares in 4 ways, for example, as 46703556 + 83576164 = 6834^2 + 9142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42396 + ... + 45364.

Almost surely, 2^130279720 is an apocalyptic number.

130279720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130279720 is an abundant number, since it is smaller than the sum of its proper divisors (163215680).

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

130279720 is a wasteful number, since it uses less digits than its factorization.

130279720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077 (or 4073 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 130279720 is about 11414.0141930874. The cubic root of 130279720 is about 506.9427761757.

The spelling of 130279720 in words is "one hundred thirty million, two hundred seventy-nine thousand, seven hundred twenty".