79007540 has 24 divisors (see below), whose sum is σ = 166086312. Its totient is φ = 31570560.

The previous prime is 79007503. The next prime is 79007569. The reversal of 79007540 is 4570097.

It can be written as a sum of positive squares in 4 ways, for example, as 35473936 + 43533604 = 5956^2 + 6598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79007497 and 79007506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31202 + ... + 33638.

It is an arithmetic number, because the mean of its divisors is an integer number (6920263).

Almost surely, 2^79007540 is an apocalyptic number.

It is an amenable number.

79007540 is an abundant number, since it is smaller than the sum of its proper divisors (87078772).

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

79007540 is a wasteful number, since it uses less digits than its factorization.

79007540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067 (or 4065 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 79007540 is about 8888.6185653340. The cubic root of 79007540 is about 429.0976932965.

The spelling of 79007540 in words is "seventy-nine million, seven thousand, five hundred forty".