87631782 has 64 divisors (see below), whose sum is σ = 207028224. Its totient is φ = 24210720.

The previous prime is 87631763. The next prime is 87631811. The reversal of 87631782 is 28713678.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203107 + ... + 203537.

It is an arithmetic number, because the mean of its divisors is an integer number (3234816).

Almost surely, 2^87631782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87631782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103514112).

87631782 is an abundant number, since it is smaller than the sum of its proper divisors (119396442).

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

87631782 is a wasteful number, since it uses less digits than its factorization.

87631782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

The product of its digits is 112896, while the sum is 42.

The square root of 87631782 is about 9361.1848609030. The cubic root of 87631782 is about 444.1747648184.

It can be divided in two parts, 8763 and 1782, that multiplied together give a triangular number (15615666 = T₅₅₈₈).

The spelling of 87631782 in words is "eighty-seven million, six hundred thirty-one thousand, seven hundred eighty-two".