87280731 has 12 divisors (see below), whose sum is σ = 126246120. Its totient is φ = 58106880.

The previous prime is 87280727. The next prime is 87280747. The reversal of 87280731 is 13708278.

It is not a de Polignac number, because 87280731 - 2² = 87280727 is a prime.

It is a super-2 number, since 2×87280731² = 15235852007788722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (87280031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 616 + ... + 13226.

It is an arithmetic number, because the mean of its divisors is an integer number (10520510).

Almost surely, 2^87280731 is an apocalyptic number.

87280731 is a deficient number, since it is larger than the sum of its proper divisors (38965389).

87280731 is a wasteful number, since it uses less digits than its factorization.

87280731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13386 (or 13383 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 87280731 is about 9342.4156940269. The cubic root of 87280731 is about 443.5808529174.

The spelling of 87280731 in words is "eighty-seven million, two hundred eighty thousand, seven hundred thirty-one".