87404565 has 32 divisors (see below), whose sum is σ = 148646016. Its totient is φ = 43704320.

The previous prime is 87404563. The next prime is 87404587. The reversal of 87404565 is 56540478.

It is not a de Polignac number, because 87404565 - 2¹ = 87404563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87404563) 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, 89530 + ... + 90500.

It is an arithmetic number, because the mean of its divisors is an integer number (4645188).

Almost surely, 2^87404565 is an apocalyptic number.

87404565 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87404565 is a deficient number, since it is larger than the sum of its proper divisors (61241451).

87404565 is a wasteful number, since it uses less digits than its factorization.

87404565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 87404565 is about 9349.0408598957. The cubic root of 87404565 is about 443.7905381203.

The spelling of 87404565 in words is "eighty-seven million, four hundred four thousand, five hundred sixty-five".