87642486 has 40 divisors (see below), whose sum is σ = 199101144. Its totient is φ = 28810080.

The previous prime is 87642481. The next prime is 87642491. The reversal of 87642486 is 68424678.

It is an interprime number because it is at equal distance from previous prime (87642481) and next prime (87642491).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87642481) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8121 + ... + 15531.

Almost surely, 2^87642486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87642486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99550572).

87642486 is an abundant number, since it is smaller than the sum of its proper divisors (111458658).

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

87642486 is a wasteful number, since it uses less digits than its factorization.

87642486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498 (or 7489 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 87642486 is about 9361.7565659442. The cubic root of 87642486 is about 444.1928490226.

The spelling of 87642486 in words is "eighty-seven million, six hundred forty-two thousand, four hundred eighty-six".