87500000 has 108 divisors (see below), whose sum is σ = 246093624. Its totient is φ = 30000000.

The previous prime is 87499967. The next prime is 87500029. The reversal of 87500000 is 578.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 17 ways as a sum of consecutive naturals, for example, 12499997 + ... + 12500003.

Almost surely, 2^87500000 is an apocalyptic number.

87500000 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 87500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123046812).

87500000 is an abundant number, since it is smaller than the sum of its proper divisors (158593624).

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

87500000 is an frugal number, since it uses more digits than its factorization.

87500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 87500000 is about 9354.1434669349. The cubic root of 87500000 is about 443.9520008713.

Adding to 87500000 its reverse (578), we get a palindrome (87500578).

The spelling of 87500000 in words is "eighty-seven million, five hundred thousand".