87387865 has 16 divisors (see below), whose sum is σ = 106963200. Its totient is φ = 68523840.

The previous prime is 87387841. The next prime is 87387877. The reversal of 87387865 is 56878378.

It is not a de Polignac number, because 87387865 - 2¹³ = 87379673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70027 + ... + 71263.

It is an arithmetic number, because the mean of its divisors is an integer number (6685200).

Almost surely, 2^87387865 is an apocalyptic number.

It is an amenable number.

87387865 is a deficient number, since it is larger than the sum of its proper divisors (19575335).

87387865 is a wasteful number, since it uses less digits than its factorization.

87387865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512.

The product of its digits is 2257920, while the sum is 52.

The square root of 87387865 is about 9348.1476774814. The cubic root of 87387865 is about 443.7622719611.

The spelling of 87387865 in words is "eighty-seven million, three hundred eighty-seven thousand, eight hundred sixty-five".