87398190 has 160 divisors (see below), whose sum is σ = 271918944. Its totient is φ = 19906560.

The previous prime is 87398189. The next prime is 87398197. The reversal of 87398190 is 9189378.

It is a super-2 number, since 2×87398190² = 15276887230552200, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87398197) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 151182 + ... + 151758.

Almost surely, 2^87398190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87398190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135959472).

87398190 is an abundant number, since it is smaller than the sum of its proper divisors (184520754).

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

87398190 is a wasteful number, since it uses less digits than its factorization.

87398190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 87398190 is about 9348.6999096131. The cubic root of 87398190 is about 443.7797483198.

The spelling of 87398190 in words is "eighty-seven million, three hundred ninety-eight thousand, one hundred ninety".