79444440 has 96 divisors (see below), whose sum is σ = 261817920. Its totient is φ = 20888064.

The previous prime is 79444433. The next prime is 79444447. The reversal of 79444440 is 4444497.

It is an interprime number because it is at equal distance from previous prime (79444433) and next prime (79444447).

It is a super-2 number, since 2×79444440² = 12622838093827200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 79444395 and 79444404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79444447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24769 + ... + 27791.

It is an arithmetic number, because the mean of its divisors is an integer number (2727270).

Almost surely, 2^79444440 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 79444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130908960).

79444440 is an abundant number, since it is smaller than the sum of its proper divisors (182373480).

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

79444440 is a wasteful number, since it uses less digits than its factorization.

79444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113 (or 3106 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 79444440 is about 8913.1610554281. The cubic root of 79444440 is about 429.8871887226.

The spelling of 79444440 in words is "seventy-nine million, four hundred forty-four thousand, four hundred forty".