87825138 has 16 divisors (see below), whose sum is σ = 176301696. Its totient is φ = 29166480.

The previous prime is 87825107. The next prime is 87825181. The reversal of 87825138 is 83152878.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 87825138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25381 + ... + 28632.

It is an arithmetic number, because the mean of its divisors is an integer number (11018856).

Almost surely, 2^87825138 is an apocalyptic number.

87825138 is an abundant number, since it is smaller than the sum of its proper divisors (88476558).

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

87825138 is a wasteful number, since it uses less digits than its factorization.

87825138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54289.

The product of its digits is 107520, while the sum is 42.

The square root of 87825138 is about 9371.5067091690. The cubic root of 87825138 is about 444.5012094209.

The spelling of 87825138 in words is "eighty-seven million, eight hundred twenty-five thousand, one hundred thirty-eight".