87710138 has 4 divisors (see below), whose sum is σ = 131565210. Its totient is φ = 43855068.

The previous prime is 87710107. The next prime is 87710143. The reversal of 87710138 is 83101778.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68674369 + 19035769 = 8287^2 + 4363^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87710098 and 87710107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21927533 + ... + 21927536.

Almost surely, 2^87710138 is an apocalyptic number.

87710138 is a deficient number, since it is larger than the sum of its proper divisors (43855072).

87710138 is a wasteful number, since it uses less digits than its factorization.

87710138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43855071.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 87710138 is about 9365.3690797533. The cubic root of 87710138 is about 444.3071117401.

The spelling of 87710138 in words is "eighty-seven million, seven hundred ten thousand, one hundred thirty-eight".