80388720 has 80 divisors (see below), whose sum is σ = 276901920. Its totient is φ = 21436416.

The previous prime is 80388713. The next prime is 80388731. The reversal of 80388720 is 2788308.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16449 + ... + 20768.

It is an arithmetic number, because the mean of its divisors is an integer number (3461274).

Almost surely, 2^80388720 is an apocalyptic number.

80388720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80388720 is an abundant number, since it is smaller than the sum of its proper divisors (196513200).

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

80388720 is a wasteful number, since it uses less digits than its factorization.

80388720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37239 (or 37227 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80388720 is about 8965.9756858916. The cubic root of 80388720 is about 431.5837039041.

The spelling of 80388720 in words is "eighty million, three hundred eighty-eight thousand, seven hundred twenty".