78810080 has 24 divisors (see below), whose sum is σ = 186189192. Its totient is φ = 31523968.

The previous prime is 78810073. The next prime is 78810089. The reversal of 78810080 is 8001887.

It is a super-2 number, since 2×78810080² = 12422057419212800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78810089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246122 + ... + 246441.

It is an arithmetic number, because the mean of its divisors is an integer number (7757883).

Almost surely, 2^78810080 is an apocalyptic number.

It is an amenable number.

78810080 is an abundant number, since it is smaller than the sum of its proper divisors (107379112).

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

78810080 is a wasteful number, since it uses less digits than its factorization.

78810080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492578 (or 492570 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 78810080 is about 8877.5041537585. The cubic root of 78810080 is about 428.7399202043.

The spelling of 78810080 in words is "seventy-eight million, eight hundred ten thousand, eighty".