87000000 has 196 divisors, whose sum is σ = 297652440. Its totient is φ = 22400000.

The previous prime is 86999989. The next prime is 87000037. The reversal of 87000000 is 78.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2999986 + ... + 3000014.

Almost surely, 2^87000000 is an apocalyptic number.

87000000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148826220).

87000000 is an abundant number, since it is smaller than the sum of its proper divisors (210652440).

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

87000000 is an frugal number, since it uses more digits than its factorization.

87000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 87000000 is about 9327.3790530888. The cubic root of 87000000 is about 443.1047621694.

Adding to 87000000 its reverse (78), we get a palindrome (87000078).

The spelling of 87000000 in words is "eighty-seven million", and thus it is an aban number and an uban number.