87133844 has 24 divisors (see below), whose sum is σ = 181845888. Its totient is φ = 35719200.

The previous prime is 87133807. The next prime is 87133847. The reversal of 87133844 is 44833178.

It is a junction number, because it is equal to n+sod(n) for n = 87133798 and 87133807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87133847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67007 + ... + 68294.

It is an arithmetic number, because the mean of its divisors is an integer number (7576912).

Almost surely, 2^87133844 is an apocalyptic number.

It is an amenable number.

87133844 is an abundant number, since it is smaller than the sum of its proper divisors (94712044).

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

87133844 is a wasteful number, since it uses less digits than its factorization.

87133844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135335 (or 135333 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 87133844 is about 9334.5510872243. The cubic root of 87133844 is about 443.3318752975.

The spelling of 87133844 in words is "eighty-seven million, one hundred thirty-three thousand, eight hundred forty-four".