79855540 has 24 divisors (see below), whose sum is σ = 174988800. Its totient is φ = 30553248.

The previous prime is 79855481. The next prime is 79855547. The reversal of 79855540 is 4555897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79855547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86340 + ... + 87259.

It is an arithmetic number, because the mean of its divisors is an integer number (7291200).

Almost surely, 2^79855540 is an apocalyptic number.

It is an amenable number.

79855540 is an abundant number, since it is smaller than the sum of its proper divisors (95133260).

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

79855540 is a wasteful number, since it uses less digits than its factorization.

79855540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173631 (or 173629 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 79855540 is about 8936.1927015928. The cubic root of 79855540 is about 430.6274237082.

The spelling of 79855540 in words is "seventy-nine million, eight hundred fifty-five thousand, five hundred forty".