79103640 has 192 divisors, whose sum is σ = 301397760. Its totient is φ = 16423680.

The previous prime is 79103639. The next prime is 79103659. The reversal of 79103640 is 4630197.

It is a happy number.

It is a super-2 number, since 2×79103640² = 12514771722499200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 79103598 and 79103607.

It is a congruent number.

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, 64069 + ... + 65291.

It is an arithmetic number, because the mean of its divisors is an integer number (1569780).

Almost surely, 2^79103640 is an apocalyptic number.

79103640 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 79103640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150698880).

79103640 is an abundant number, since it is smaller than the sum of its proper divisors (222294120).

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

79103640 is a wasteful number, since it uses less digits than its factorization.

79103640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 79103640 is about 8894.0227119116. The cubic root of 79103640 is about 429.2715989791.

The spelling of 79103640 in words is "seventy-nine million, one hundred three thousand, six hundred forty".