80831840 has 48 divisors (see below), whose sum is σ = 191518992. Its totient is φ = 32239104.

The previous prime is 80831819. The next prime is 80831851. The reversal of 80831840 is 4813808.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 80831797 and 80831806.

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 7 ways as a sum of consecutive naturals, for example, 88667 + ... + 89573.

It is an arithmetic number, because the mean of its divisors is an integer number (3989979).

Almost surely, 2^80831840 is an apocalyptic number.

80831840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80831840 is an abundant number, since it is smaller than the sum of its proper divisors (110687152).

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

80831840 is a wasteful number, since it uses less digits than its factorization.

80831840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 80831840 is about 8990.6529240095. The cubic root of 80831840 is about 432.3752455176.

The spelling of 80831840 in words is "eighty million, eight hundred thirty-one thousand, eight hundred forty".