79445520 has 240 divisors, whose sum is σ = 332871552. Its totient is φ = 16496640.

The previous prime is 79445507. The next prime is 79445533. The reversal of 79445520 is 2554497.

79445520 is a `hidden beast` number, since 7 + 94 + 45 + 520 = 666.

It is an interprime number because it is at equal distance from previous prime (79445507) and next prime (79445533).

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54724 + ... + 56156.

Almost surely, 2^79445520 is an apocalyptic number.

79445520 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 79445520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166435776).

79445520 is an abundant number, since it is smaller than the sum of its proper divisors (253426032).

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

79445520 is a wasteful number, since it uses less digits than its factorization.

79445520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 79445520 is about 8913.2216397888. The cubic root of 79445520 is about 429.8891367341.

The spelling of 79445520 in words is "seventy-nine million, four hundred forty-five thousand, five hundred twenty".