80377840 has 20 divisors (see below), whose sum is σ = 186878664. Its totient is φ = 32151104.

The previous prime is 80377813. The next prime is 80377859. The reversal of 80377840 is 4877308.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 80377840.

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, 502282 + ... + 502441.

Almost surely, 2^80377840 is an apocalyptic number.

80377840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80377840 is an abundant number, since it is smaller than the sum of its proper divisors (106500824).

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

80377840 is a wasteful number, since it uses less digits than its factorization.

80377840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004736 (or 1004730 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 80377840 is about 8965.3689271552. The cubic root of 80377840 is about 431.5642325050.

The spelling of 80377840 in words is "eighty million, three hundred seventy-seven thousand, eight hundred forty".