79147440 has 120 divisors (see below), whose sum is σ = 273079248. Its totient is φ = 20528640.

The previous prime is 79147429. The next prime is 79147457. The reversal of 79147440 is 4474197.

79147440 is a `hidden beast` number, since 79 + 147 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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 = 79147395 and 79147404.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25155 + ... + 28125.

Almost surely, 2^79147440 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 79147440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136539624).

79147440 is an abundant number, since it is smaller than the sum of its proper divisors (193931808).

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

79147440 is a wasteful number, since it uses less digits than its factorization.

79147440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 79147440 is about 8896.4846990258. The cubic root of 79147440 is about 429.3508141573.

The spelling of 79147440 in words is "seventy-nine million, one hundred forty-seven thousand, four hundred forty".