87990126 has 64 divisors (see below), whose sum is σ = 208631808. Its totient is φ = 24218208.

The previous prime is 87990101. The next prime is 87990137. The reversal of 87990126 is 62109978.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149605 + ... + 150191.

It is an arithmetic number, because the mean of its divisors is an integer number (3259872).

Almost surely, 2^87990126 is an apocalyptic number.

87990126 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 87990126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104315904).

87990126 is an abundant number, since it is smaller than the sum of its proper divisors (120641682).

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

87990126 is a wasteful number, since it uses less digits than its factorization.

87990126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 87990126 is about 9380.3052189148. The cubic root of 87990126 is about 444.7793814466.

The spelling of 87990126 in words is "eighty-seven million, nine hundred ninety thousand, one hundred twenty-six".