79878582 has 32 divisors (see below), whose sum is σ = 202867200. Its totient is φ = 22822344.

The previous prime is 79878581. The next prime is 79878593. The reversal of 79878582 is 28587897.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79878581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105282 + ... + 106037.

It is an arithmetic number, because the mean of its divisors is an integer number (6339600).

Almost surely, 2^79878582 is an apocalyptic number.

79878582 is an abundant number, since it is smaller than the sum of its proper divisors (122988618).

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

79878582 is a wasteful number, since it uses less digits than its factorization.

79878582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211337 (or 211331 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 79878582 is about 8937.4818601215. The cubic root of 79878582 is about 430.6688383380.

The spelling of 79878582 in words is "seventy-nine million, eight hundred seventy-eight thousand, five hundred eighty-two".