80996640 has 48 divisors (see below), whose sum is σ = 255140928. Its totient is φ = 21598976.

The previous prime is 80996633. The next prime is 80996683. The reversal of 80996640 is 4669908.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 80996592 and 80996601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83892 + ... + 84851.

It is an arithmetic number, because the mean of its divisors is an integer number (5315436).

Almost surely, 2^80996640 is an apocalyptic number.

80996640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80996640 is an abundant number, since it is smaller than the sum of its proper divisors (174144288).

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

80996640 is a wasteful number, since it uses less digits than its factorization.

80996640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168761 (or 168753 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 80996640 is about 8999.8133313975. The cubic root of 80996640 is about 432.6688883446.

The spelling of 80996640 in words is "eighty million, nine hundred ninety-six thousand, six hundred forty".