130992778 has 24 divisors (see below), whose sum is σ = 229464900. Its totient is φ = 55919808.

The previous prime is 130992761. The next prime is 130992779. The reversal of 130992778 is 877299031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108930969 + 22061809 = 10437^2 + 4697^2 .

It is not an unprimeable number, because it can be changed into a prime (130992779) 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, 23878 + ... + 28846.

Almost surely, 2^130992778 is an apocalyptic number.

130992778 is a deficient number, since it is larger than the sum of its proper divisors (98472122).

130992778 is a wasteful number, since it uses less digits than its factorization.

130992778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254 (or 5247 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 130992778 is about 11445.2076433763. The cubic root of 130992778 is about 507.8659746253.

The spelling of 130992778 in words is "one hundred thirty million, nine hundred ninety-two thousand, seven hundred seventy-eight".