87145164 has 18 divisors (see below), whose sum is σ = 220283700. Its totient is φ = 29048376.

The previous prime is 87145159. The next prime is 87145171. The reversal of 87145164 is 46154178.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2420699 = 87145164 / (8 + 7 + 1 + 4 + 5 + 1 + 6 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1210314 + ... + 1210385.

Almost surely, 2^87145164 is an apocalyptic number.

It is an amenable number.

87145164 is an abundant number, since it is smaller than the sum of its proper divisors (133138536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87145164 is a wasteful number, since it uses less digits than its factorization.

87145164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420709 (or 2420704 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 87145164 is about 9335.1574169909. The cubic root of 87145164 is about 443.3510729643.

The spelling of 87145164 in words is "eighty-seven million, one hundred forty-five thousand, one hundred sixty-four".