87861212 has 24 divisors (see below), whose sum is σ = 158192496. Its totient is φ = 42674688.

The previous prime is 87861209. The next prime is 87861233. The reversal of 87861212 is 21216878.

It is a congruent number.

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, 32588 + ... + 35180.

It is an arithmetic number, because the mean of its divisors is an integer number (6591354).

Almost surely, 2^87861212 is an apocalyptic number.

It is an amenable number.

87861212 is a deficient number, since it is larger than the sum of its proper divisors (70331284).

87861212 is a wasteful number, since it uses less digits than its factorization.

87861212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2835 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 87861212 is about 9373.4311754021. The cubic root of 87861212 is about 444.5620604181.

The spelling of 87861212 in words is "eighty-seven million, eight hundred sixty-one thousand, two hundred twelve".