80999750 has 32 divisors (see below), whose sum is σ = 163302048. Its totient is φ = 29906400.

The previous prime is 80999731. The next prime is 80999777. The reversal of 80999750 is 5799908.

It is a junction number, because it is equal to n+sod(n) for n = 80999695 and 80999704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9212 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (5103189).

Almost surely, 2^80999750 is an apocalyptic number.

80999750 is an abundant number, since it is smaller than the sum of its proper divisors (82302298).

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

80999750 is a wasteful number, since it uses less digits than its factorization.

80999750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24953 (or 24943 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 80999750 is about 8999.9861111004. The cubic root of 80999750 is about 432.6744259530.

The spelling of 80999750 in words is "eighty million, nine hundred ninety-nine thousand, seven hundred fifty".