79856868 has 144 divisors (see below), whose sum is σ = 241672704. Its totient is φ = 20321280.

The previous prime is 79856863. The next prime is 79856879. The reversal of 79856868 is 86865897.

It is not an unprimeable number, because it can be changed into a prime (79856863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236796 + ... + 237132.

Almost surely, 2^79856868 is an apocalyptic number.

79856868 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79856868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120836352).

79856868 is an abundant number, since it is smaller than the sum of its proper divisors (161815836).

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

79856868 is a wasteful number, since it uses less digits than its factorization.

79856868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 393 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The square root of 79856868 is about 8936.2670058588. The cubic root of 79856868 is about 430.6298108106.

The spelling of 79856868 in words is "seventy-nine million, eight hundred fifty-six thousand, eight hundred sixty-eight".