79235640 has 288 divisors, whose sum is σ = 302505840. Its totient is φ = 17909760.

The previous prime is 79235633. The next prime is 79235669. The reversal of 79235640 is 4653297.

79235640 is a `hidden beast` number, since 7 + 9 + 2 + 3 + 5 + 640 = 666.

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 = 79235595 and 79235604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 740467 + ... + 740573.

Almost surely, 2^79235640 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 79235640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151252920).

79235640 is an abundant number, since it is smaller than the sum of its proper divisors (223270200).

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

79235640 is a wasteful number, since it uses less digits than its factorization.

79235640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 79235640 is about 8901.4403328900. The cubic root of 79235640 is about 429.5102410187.

The spelling of 79235640 in words is "seventy-nine million, two hundred thirty-five thousand, six hundred forty".