87264891 has 48 divisors (see below), whose sum is σ = 156057600. Its totient is φ = 47204208.

The previous prime is 87264889. The next prime is 87264917. The reversal of 87264891 is 19846278.

It is not a de Polignac number, because 87264891 - 2¹ = 87264889 is a prime.

It is a super-2 number, since 2×87264891² = 15230322402483762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87264811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67590 + ... + 68868.

It is an arithmetic number, because the mean of its divisors is an integer number (3251200).

Almost surely, 2^87264891 is an apocalyptic number.

87264891 is a deficient number, since it is larger than the sum of its proper divisors (68792709).

87264891 is a wasteful number, since it uses less digits than its factorization.

87264891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1308 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 87264891 is about 9341.5679090825. The cubic root of 87264891 is about 443.5540171133.

The spelling of 87264891 in words is "eighty-seven million, two hundred sixty-four thousand, eight hundred ninety-one".