87280431 has 64 divisors (see below), whose sum is σ = 148055040. Its totient is φ = 44605440.

The previous prime is 87280429. The next prime is 87280441. The reversal of 87280431 is 13408278.

It is not a de Polignac number, because 87280431 - 2¹ = 87280429 is a prime.

It is a super-2 number, since 2×87280431² = 15235747271091522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87280392 and 87280401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87280421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 980635 + ... + 980723.

It is an arithmetic number, because the mean of its divisors is an integer number (2313360).

Almost surely, 2^87280431 is an apocalyptic number.

87280431 is a deficient number, since it is larger than the sum of its proper divisors (60774609).

87280431 is a wasteful number, since it uses less digits than its factorization.

87280431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 87280431 is about 9342.3996382086. The cubic root of 87280431 is about 443.5803446937.

The spelling of 87280431 in words is "eighty-seven million, two hundred eighty thousand, four hundred thirty-one".