87088815 has 24 divisors (see below), whose sum is σ = 164677968. Its totient is φ = 42224640.

The previous prime is 87088801. The next prime is 87088817. The reversal of 87088815 is 51888078.

It is a happy number.

It is not a de Polignac number, because 87088815 - 2⁵ = 87088783 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87088817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87474 + ... + 88463.

It is an arithmetic number, because the mean of its divisors is an integer number (6861582).

Almost surely, 2^87088815 is an apocalyptic number.

87088815 is a deficient number, since it is larger than the sum of its proper divisors (77589153).

87088815 is a wasteful number, since it uses less digits than its factorization.

87088815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175959 (or 175956 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The square root of 87088815 is about 9332.1388223708. The cubic root of 87088815 is about 443.2554938370.

The spelling of 87088815 in words is "eighty-seven million, eighty-eight thousand, eight hundred fifteen".