79257240 has 96 divisors (see below), whose sum is σ = 259627680. Its totient is φ = 20967936.

The previous prime is 79257221. The next prime is 79257251. The reversal of 79257240 is 4275297.

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 = 79257195 and 79257204.

It is a congruent number.

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, 48517 + ... + 50123.

It is an arithmetic number, because the mean of its divisors is an integer number (2704455).

Almost surely, 2^79257240 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 79257240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129813840).

79257240 is an abundant number, since it is smaller than the sum of its proper divisors (180370440).

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

79257240 is a wasteful number, since it uses less digits than its factorization.

79257240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 79257240 is about 8902.6535370079. The cubic root of 79257240 is about 429.5492662954.

It can be divided in two parts, 79257 and 240, that added together give a palindrome (79497).

The spelling of 79257240 in words is "seventy-nine million, two hundred fifty-seven thousand, two hundred forty".