87637788 has 120 divisors (see below), whose sum is σ = 277355232. Its totient is φ = 23556096.

The previous prime is 87637727. The next prime is 87637789. The reversal of 87637788 is 88773678.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87637789) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37420 + ... + 39692.

Almost surely, 2^87637788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87637788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138677616).

87637788 is an abundant number, since it is smaller than the sum of its proper divisors (189717444).

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

87637788 is a wasteful number, since it uses less digits than its factorization.

87637788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2302 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 87637788 is about 9361.5056481316. The cubic root of 87637788 is about 444.1849120224.

The spelling of 87637788 in words is "eighty-seven million, six hundred thirty-seven thousand, seven hundred eighty-eight".