988390 has 16 divisors (see below), whose sum is σ = 1916208. Its totient is φ = 364896.

The previous prime is 988367. The next prime is 988409. The reversal of 988390 is 93889.

It is a congruent number.

It is an unprimeable number.

988390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3672 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (119763).

2⁹⁸⁸³⁹⁰ is an apocalyptic number.

988390 is a deficient number, since it is larger than the sum of its proper divisors (927818).

988390 is a wasteful number, since it uses less digits than its factorization.

988390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7623.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 988390 is about 994.1780524634. The cubic root of 988390 is about 99.6114925745.

It can be divided in two parts, 988 and 390, that added together give a triangular number (1378 = T₅₂).

The spelling of 988390 in words is "nine hundred eighty-eight thousand, three hundred ninety".