87158000 has 40 divisors (see below), whose sum is σ = 210752880. Its totient is φ = 34862400.

The previous prime is 87157999. The next prime is 87158003. The reversal of 87158000 is 85178.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87158003) 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, 19790 + ... + 23789.

It is an arithmetic number, because the mean of its divisors is an integer number (5268822).

Almost surely, 2^87158000 is an apocalyptic number.

87158000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87158000 is an abundant number, since it is smaller than the sum of its proper divisors (123594880).

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

87158000 is a wasteful number, since it uses less digits than its factorization.

87158000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43602 (or 43586 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 87158000 is about 9335.8449001684. The cubic root of 87158000 is about 443.3728396148.

The spelling of 87158000 in words is "eighty-seven million, one hundred fifty-eight thousand".