79887558 has 16 divisors (see below), whose sum is σ = 164929536. Its totient is φ = 25770120.

The previous prime is 79887553. The next prime is 79887569. The reversal of 79887558 is 85578897.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 79887498 and 79887507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79887553) 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, 214566 + ... + 214937.

It is an arithmetic number, because the mean of its divisors is an integer number (10308096).

Almost surely, 2^79887558 is an apocalyptic number.

79887558 is an abundant number, since it is smaller than the sum of its proper divisors (85041978).

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

79887558 is a wasteful number, since it uses less digits than its factorization.

79887558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429539.

The product of its digits is 5644800, while the sum is 57.

The square root of 79887558 is about 8937.9840008807. The cubic root of 79887558 is about 430.6849692316.

The spelling of 79887558 in words is "seventy-nine million, eight hundred eighty-seven thousand, five hundred fifty-eight".