87519690 has 80 divisors (see below), whose sum is σ = 237105792. Its totient is φ = 23162976.

The previous prime is 87519683. The next prime is 87519701. The reversal of 87519690 is 9691578.

It is a super-2 number, since 2×87519690² = 15319392275392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 134947 + ... + 135593.

Almost surely, 2^87519690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87519690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118552896).

87519690 is an abundant number, since it is smaller than the sum of its proper divisors (149586102).

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

87519690 is a wasteful number, since it uses less digits than its factorization.

87519690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 87519690 is about 9355.1958825029. The cubic root of 87519690 is about 443.9852990019.

It can be divided in two parts, 87519 and 690, that added together give a square (88209 = 297²).

The spelling of 87519690 in words is "eighty-seven million, five hundred nineteen thousand, six hundred ninety".