80987580 has 96 divisors (see below), whose sum is σ = 257402880. Its totient is φ = 21130560.

The previous prime is 80987567. The next prime is 80987581. The reversal of 80987580 is 8578908.

It is a super-2 number, since 2×80987580² = 13117976228512800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80987581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23785 + ... + 26975.

It is an arithmetic number, because the mean of its divisors is an integer number (2681280).

Almost surely, 2^80987580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80987580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128701440).

80987580 is an abundant number, since it is smaller than the sum of its proper divisors (176415300).

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

80987580 is a wasteful number, since it uses less digits than its factorization.

80987580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 80987580 is about 8999.3099735480. The cubic root of 80987580 is about 432.6527554684.

The spelling of 80987580 in words is "eighty million, nine hundred eighty-seven thousand, five hundred eighty".