78135080 has 32 divisors (see below), whose sum is σ = 176164200. Its totient is φ = 31190016.

The previous prime is 78135067. The next prime is 78135089. The reversal of 78135080 is 8053187.

It can be written as a sum of positive squares in 4 ways, for example, as 43112356 + 35022724 = 6566^2 + 5918^2 .

It is a super-2 number, since 2×78135080² = 12210181453212800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78135089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21044 + ... + 24476.

Almost surely, 2^78135080 is an apocalyptic number.

It is an amenable number.

78135080 is an abundant number, since it is smaller than the sum of its proper divisors (98029120).

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

78135080 is a wasteful number, since it uses less digits than its factorization.

78135080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4013 (or 4009 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 78135080 is about 8839.4049573487. The cubic root of 78135080 is about 427.5123715399.

The spelling of 78135080 in words is "seventy-eight million, one hundred thirty-five thousand, eighty".