981904 has 40 divisors (see below), whose sum is σ = 2374848. Its totient is φ = 382080.

The previous prime is 981889. The next prime is 981913. The reversal of 981904 is 409189.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834 + ... + 1630.

2⁹⁸¹⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187424).

981904 is an abundant number, since it is smaller than the sum of its proper divisors (1392944).

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

981904 is a wasteful number, since it uses less digits than its factorization.

981904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 981904 is about 990.9106922422. The cubic root of 981904 is about 99.3931244713.

It can be divided in two parts, 98 and 1904, that added together give a palindrome (2002).

The spelling of 981904 in words is "nine hundred eighty-one thousand, nine hundred four".