87023540 has 12 divisors (see below), whose sum is σ = 182749476. Its totient is φ = 34809408.

The previous prime is 87023501. The next prime is 87023543. The reversal of 87023540 is 4532078.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38887696 + 48135844 = 6236^2 + 6938^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87023543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2175569 + ... + 2175608.

It is an arithmetic number, because the mean of its divisors is an integer number (15229123).

Almost surely, 2^87023540 is an apocalyptic number.

It is an amenable number.

87023540 is an abundant number, since it is smaller than the sum of its proper divisors (95725936).

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

87023540 is a wasteful number, since it uses less digits than its factorization.

87023540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4351186 (or 4351184 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 87023540 is about 9328.6408441959. The cubic root of 87023540 is about 443.1447228800.

The spelling of 87023540 in words is "eighty-seven million, twenty-three thousand, five hundred forty".