987390 has 80 divisors (see below), whose sum is σ = 2822688. Its totient is φ = 247104.

The previous prime is 987383. The next prime is 987391. The reversal of 987390 is 93789.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987390.

It is not an unprimeable number, because it can be changed into a prime (987391) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18604 + ... + 18656.

2⁹⁸⁷³⁹⁰ is an apocalyptic number.

987390 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 987390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411344).

987390 is an abundant number, since it is smaller than the sum of its proper divisors (1835298).

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

987390 is a wasteful number, since it uses less digits than its factorization.

987390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 987390 is about 993.6749971696. The cubic root of 987390 is about 99.5778873831.

The spelling of 987390 in words is "nine hundred eighty-seven thousand, three hundred ninety".