79220856 has 128 divisors (see below), whose sum is σ = 238775040. Its totient is φ = 21580800.

The previous prime is 79220851. The next prime is 79220863. The reversal of 79220856 is 65802297.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79220851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140431 + ... + 140993.

It is an arithmetic number, because the mean of its divisors is an integer number (1865430).

Almost surely, 2^79220856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79220856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119387520).

79220856 is an abundant number, since it is smaller than the sum of its proper divisors (159554184).

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

79220856 is a wasteful number, since it uses less digits than its factorization.

79220856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 79220856 is about 8900.6098667451. The cubic root of 79220856 is about 429.4835262964.

The spelling of 79220856 in words is "seventy-nine million, two hundred twenty thousand, eight hundred fifty-six".