79883440 has 80 divisors (see below), whose sum is σ = 228610368. Its totient is φ = 25279488.

The previous prime is 79883437. The next prime is 79883443. The reversal of 79883440 is 4438897.

It is an interprime number because it is at equal distance from previous prime (79883437) and next prime (79883443).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (79883443) 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, 1794 + ... + 12766.

Almost surely, 2^79883440 is an apocalyptic number.

79883440 is a gapful number since it is divisible by the number (70) 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 79883440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114305184).

79883440 is an abundant number, since it is smaller than the sum of its proper divisors (148726928).

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

79883440 is a wasteful number, since it uses less digits than its factorization.

79883440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006 (or 11000 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 79883440 is about 8937.7536327648. The cubic root of 79883440 is about 430.6775688669.

The spelling of 79883440 in words is "seventy-nine million, eight hundred eighty-three thousand, four hundred forty".