80726388 has 12 divisors (see below), whose sum is σ = 188361600. Its totient is φ = 26908792.

The previous prime is 80726333. The next prime is 80726411. The reversal of 80726388 is 88362708.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3363588 + ... + 3363611.

It is an arithmetic number, because the mean of its divisors is an integer number (15696800).

Almost surely, 2^80726388 is an apocalyptic number.

It is an amenable number.

80726388 is an abundant number, since it is smaller than the sum of its proper divisors (107635212).

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

80726388 is a wasteful number, since it uses less digits than its factorization.

80726388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727206 (or 6727204 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 80726388 is about 8984.7864749253. The cubic root of 80726388 is about 432.1871402849.

The spelling of 80726388 in words is "eighty million, seven hundred twenty-six thousand, three hundred eighty-eight".