87650000 has 60 divisors (see below), whose sum is σ = 212384844. Its totient is φ = 35040000.

The previous prime is 87649999. The next prime is 87650009. The reversal of 87650000 is 5678.

It can be written as a sum of positive squares in 6 ways, for example, as 86341264 + 1308736 = 9292^2 + 1144^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87650009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49124 + ... + 50876.

Almost surely, 2^87650000 is an apocalyptic number.

87650000 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 87650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106192422).

87650000 is an abundant number, since it is smaller than the sum of its proper divisors (124734844).

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

87650000 is an equidigital number, since it uses as much as digits as its factorization.

87650000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786 (or 1760 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 87650000 is about 9362.1578709184. The cubic root of 87650000 is about 444.2055429029.

Adding to 87650000 its reverse (5678), we get a palindrome (87655678).

The spelling of 87650000 in words is "eighty-seven million, six hundred fifty thousand".