79091040 has 96 divisors (see below), whose sum is σ = 284739840. Its totient is φ = 18077184.

The previous prime is 79091017. The next prime is 79091063. The reversal of 79091040 is 4019097.

It is an interprime number because it is at equal distance from previous prime (79091017) and next prime (79091063).

It is a tau number, because it is divible by the number of its divisors (96).

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 = 79090989 and 79091007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8410 + ... + 15129.

It is an arithmetic number, because the mean of its divisors is an integer number (2966040).

Almost surely, 2^79091040 is an apocalyptic number.

79091040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79091040 is an abundant number, since it is smaller than the sum of its proper divisors (205648800).

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

79091040 is a wasteful number, since it uses less digits than its factorization.

79091040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23564 (or 23556 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 79091040 is about 8893.3143428083. The cubic root of 79091040 is about 429.2488056354.

The spelling of 79091040 in words is "seventy-nine million, ninety-one thousand, forty".