87158240 has 48 divisors (see below), whose sum is σ = 221755968. Its totient is φ = 32180736.

The previous prime is 87158237. The next prime is 87158249. The reversal of 87158240 is 4285178.

It is a self number, because there is not a number n which added to its sum of digits gives 87158240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87158249) 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, 18872 + ... + 23031.

It is an arithmetic number, because the mean of its divisors is an integer number (4619916).

Almost surely, 2^87158240 is an apocalyptic number.

87158240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87158240 is an abundant number, since it is smaller than the sum of its proper divisors (134597728).

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

87158240 is a wasteful number, since it uses less digits than its factorization.

87158240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41931 (or 41923 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 87158240 is about 9335.8577538435. The cubic root of 87158240 is about 443.3732465745.

The spelling of 87158240 in words is "eighty-seven million, one hundred fifty-eight thousand, two hundred forty".