78812055 has 32 divisors (see below), whose sum is σ = 160128000. Its totient is φ = 36027936.

The previous prime is 78812047. The next prime is 78812131. The reversal of 78812055 is 55021887.

It is not a de Polignac number, because 78812055 - 2³ = 78812047 is a prime.

It is a super-2 number, since 2×78812055² = 12422680026646050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40755 + ... + 42644.

It is an arithmetic number, because the mean of its divisors is an integer number (5004000).

Almost surely, 2^78812055 is an apocalyptic number.

78812055 is an abundant number, since it is smaller than the sum of its proper divisors (81315945).

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

78812055 is a wasteful number, since it uses less digits than its factorization.

78812055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83420 (or 83414 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 78812055 is about 8877.6153892811. The cubic root of 78812055 is about 428.7435016171.

The spelling of 78812055 in words is "seventy-eight million, eight hundred twelve thousand, fifty-five".