87101790 has 64 divisors (see below), whose sum is σ = 220449600. Its totient is φ = 21991424.

The previous prime is 87101771. The next prime is 87101797. The reversal of 87101790 is 9710178.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87101797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45166 + ... + 47054.

It is an arithmetic number, because the mean of its divisors is an integer number (3444525).

Almost surely, 2^87101790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87101790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110224800).

87101790 is an abundant number, since it is smaller than the sum of its proper divisors (133347810).

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

87101790 is a wasteful number, since it uses less digits than its factorization.

87101790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 87101790 is about 9332.8339747367. The cubic root of 87101790 is about 443.2775056741.

The spelling of 87101790 in words is "eighty-seven million, one hundred one thousand, seven hundred ninety".