87641886 has 32 divisors (see below), whose sum is σ = 183031200. Its totient is φ = 27941760.

The previous prime is 87641861. The next prime is 87641893. The reversal of 87641886 is 68814678.

It is a super-2 number, since 2×87641886² = 15362200363273992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16656 + ... + 21276.

It is an arithmetic number, because the mean of its divisors is an integer number (5719725).

Almost surely, 2^87641886 is an apocalyptic number.

87641886 is an abundant number, since it is smaller than the sum of its proper divisors (95389314).

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

87641886 is a wasteful number, since it uses less digits than its factorization.

87641886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4764.

The product of its digits is 516096, while the sum is 48.

The square root of 87641886 is about 9361.7245206212. The cubic root of 87641886 is about 444.1918353730.

The spelling of 87641886 in words is "eighty-seven million, six hundred forty-one thousand, eight hundred eighty-six".