87881012 has 12 divisors (see below), whose sum is σ = 154170660. Its totient is φ = 43832256.

The previous prime is 87880997. The next prime is 87881029. The reversal of 87881012 is 21018878.

It can be written as a sum of positive squares in 2 ways, for example, as 64416676 + 23464336 = 8026^2 + 4844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25223 + ... + 28494.

It is an arithmetic number, because the mean of its divisors is an integer number (12847555).

Almost surely, 2^87881012 is an apocalyptic number.

It is an amenable number.

87881012 is a deficient number, since it is larger than the sum of its proper divisors (66289648).

87881012 is a wasteful number, since it uses less digits than its factorization.

87881012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54130 (or 54128 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 87881012 is about 9374.4872926470. The cubic root of 87881012 is about 444.5954527326.

The spelling of 87881012 in words is "eighty-seven million, eight hundred eighty-one thousand, twelve".