79673440 has 192 divisors, whose sum is σ = 243855360. Its totient is φ = 23869440.

The previous prime is 79673417. The next prime is 79673459. The reversal of 79673440 is 4437697.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 79673393 and 79673402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357169 + ... + 357391.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^79673440 is an apocalyptic number.

79673440 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 79673440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121927680).

79673440 is an abundant number, since it is smaller than the sum of its proper divisors (164181920).

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

79673440 is a wasteful number, since it uses less digits than its factorization.

79673440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 79673440 is about 8925.9979834190. The cubic root of 79673440 is about 430.2998449487.

The spelling of 79673440 in words is "seventy-nine million, six hundred seventy-three thousand, four hundred forty".