79664340 has 192 divisors, whose sum is σ = 274176000. Its totient is φ = 16879104.

The previous prime is 79664317. The next prime is 79664357. The reversal of 79664340 is 4346697.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 534586 + ... + 534734.

It is an arithmetic number, because the mean of its divisors is an integer number (1428000).

Almost surely, 2^79664340 is an apocalyptic number.

79664340 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 79664340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137088000).

79664340 is an abundant number, since it is smaller than the sum of its proper divisors (194511660).

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

79664340 is a wasteful number, since it uses less digits than its factorization.

79664340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 79664340 is about 8925.4882219406. The cubic root of 79664340 is about 430.2834619161.

The spelling of 79664340 in words is "seventy-nine million, six hundred sixty-four thousand, three hundred forty".