80934640 has 40 divisors (see below), whose sum is σ = 188836128. Its totient is φ = 32259840.

The previous prime is 80934629. The next prime is 80934649. The reversal of 80934640 is 4643908.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 80934596 and 80934605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80934649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23254 + ... + 26506.

Almost surely, 2^80934640 is an apocalyptic number.

80934640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80934640 is an abundant number, since it is smaller than the sum of its proper divisors (107901488).

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

80934640 is a wasteful number, since it uses less digits than its factorization.

80934640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577 (or 3571 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 80934640 is about 8996.3681560950. The cubic root of 80934640 is about 432.5584626997.

The spelling of 80934640 in words is "eighty million, nine hundred thirty-four thousand, six hundred forty".