79867440 has 60 divisors (see below), whose sum is σ = 268223904. Its totient is φ = 21297792.

The previous prime is 79867433. The next prime is 79867441. The reversal of 79867440 is 4476897.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79867441) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 54744 + ... + 56183.

Almost surely, 2^79867440 is an apocalyptic number.

It is an amenable number.

79867440 is an abundant number, since it is smaller than the sum of its proper divisors (188356464).

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

79867440 is a wasteful number, since it uses less digits than its factorization.

79867440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110946 (or 110937 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 79867440 is about 8936.8585084469. The cubic root of 79867440 is about 430.6488132149.

The spelling of 79867440 in words is "seventy-nine million, eight hundred sixty-seven thousand, four hundred forty".