987790 has 8 divisors (see below), whose sum is σ = 1778040. Its totient is φ = 395112.

The previous prime is 987739. The next prime is 987793. The reversal of 987790 is 97789.

987790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49380 + ... + 49399.

It is an arithmetic number, because the mean of its divisors is an integer number (222255).

2⁹⁸⁷⁷⁹⁰ is an apocalyptic number.

987790 is a deficient number, since it is larger than the sum of its proper divisors (790250).

987790 is a wasteful number, since it uses less digits than its factorization.

987790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98786.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 987790 is about 993.8762498420. The cubic root of 987790 is about 99.5913321812.

The spelling of 987790 in words is "nine hundred eighty-seven thousand, seven hundred ninety".