80783680 has 28 divisors (see below), whose sum is σ = 192366900. Its totient is φ = 32313344.

The previous prime is 80783669. The next prime is 80783693. The reversal of 80783680 is 8638708.

It can be written as a sum of positive squares in 2 ways, for example, as 21678336 + 59105344 = 4656^2 + 7688^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 125905 + ... + 126544.

Almost surely, 2^80783680 is an apocalyptic number.

80783680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80783680 is an abundant number, since it is smaller than the sum of its proper divisors (111583220).

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

80783680 is a wasteful number, since it uses less digits than its factorization.

80783680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252466 (or 252456 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 80783680 is about 8987.9741877689. The cubic root of 80783680 is about 432.2893580393.

The spelling of 80783680 in words is "eighty million, seven hundred eighty-three thousand, six hundred eighty".