80689878 has 16 divisors (see below), whose sum is σ = 179310960. Its totient is φ = 26896608.

The previous prime is 80689841. The next prime is 80689879. The reversal of 80689878 is 87898608.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1494257 = 80689878 / (8 + 0 + 6 + 8 + 9 + 8 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80689879) 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, 747075 + ... + 747182.

It is an arithmetic number, because the mean of its divisors is an integer number (11206935).

Almost surely, 2^80689878 is an apocalyptic number.

80689878 is an abundant number, since it is smaller than the sum of its proper divisors (98621082).

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

80689878 is a wasteful number, since it uses less digits than its factorization.

80689878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494268 (or 1494262 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 80689878 is about 8982.7544773304. The cubic root of 80689878 is about 432.1219755877.

The spelling of 80689878 in words is "eighty million, six hundred eighty-nine thousand, eight hundred seventy-eight".