80578138 has 4 divisors (see below), whose sum is σ = 120867210. Its totient is φ = 40289068.

The previous prime is 80578111. The next prime is 80578159. The reversal of 80578138 is 83187508.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72301009 + 8277129 = 8503^2 + 2877^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 80578138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20144533 + ... + 20144536.

Almost surely, 2^80578138 is an apocalyptic number.

80578138 is a deficient number, since it is larger than the sum of its proper divisors (40289072).

80578138 is a wasteful number, since it uses less digits than its factorization.

80578138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40289071.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 80578138 is about 8976.5326267997. The cubic root of 80578138 is about 431.9224147649.

The spelling of 80578138 in words is "eighty million, five hundred seventy-eight thousand, one hundred thirty-eight".