80699540 has 12 divisors (see below), whose sum is σ = 169469076. Its totient is φ = 32279808.

The previous prime is 80699533. The next prime is 80699543. The reversal of 80699540 is 4599608.

It can be written as a sum of positive squares in 2 ways, for example, as 58553104 + 22146436 = 7652^2 + 4706^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80699543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2017469 + ... + 2017508.

It is an arithmetic number, because the mean of its divisors is an integer number (14122423).

Almost surely, 2^80699540 is an apocalyptic number.

It is an amenable number.

80699540 is an abundant number, since it is smaller than the sum of its proper divisors (88769536).

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

80699540 is a wasteful number, since it uses less digits than its factorization.

80699540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034986 (or 4034984 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 80699540 is about 8983.2922695413. The cubic root of 80699540 is about 432.1392226741.

The spelling of 80699540 in words is "eighty million, six hundred ninety-nine thousand, five hundred forty".