80721258 has 16 divisors (see below), whose sum is σ = 162924960. Its totient is φ = 26660016.

The previous prime is 80721233. The next prime is 80721269. The reversal of 80721258 is 85212708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61060 + ... + 62367.

It is an arithmetic number, because the mean of its divisors is an integer number (10182810).

Almost surely, 2^80721258 is an apocalyptic number.

80721258 is an abundant number, since it is smaller than the sum of its proper divisors (82203702).

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

80721258 is a wasteful number, since it uses less digits than its factorization.

80721258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123541.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 80721258 is about 8984.5009878123. The cubic root of 80721258 is about 432.1779852158.

The spelling of 80721258 in words is "eighty million, seven hundred twenty-one thousand, two hundred fifty-eight".