130404992 has 16 divisors (see below), whose sum is σ = 259791450. Its totient is φ = 65202432.

The previous prime is 130404991. The next prime is 130405001. The reversal of 130404992 is 299404031.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 125978176 + 4426816 = 11224^2 + 2104^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (130404991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509267 + ... + 509522.

Almost surely, 2^130404992 is an apocalyptic number.

It is an amenable number.

130404992 is a deficient number, since it is larger than the sum of its proper divisors (129386458).

130404992 is an equidigital number, since it uses as much as digits as its factorization.

130404992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018803 (or 1018791 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 130404992 is about 11419.5005144708. The cubic root of 130404992 is about 507.1052097236.

The spelling of 130404992 in words is "one hundred thirty million, four hundred four thousand, nine hundred ninety-two".