981928 has 8 divisors (see below), whose sum is σ = 1841130. Its totient is φ = 490960.

The previous prime is 981919. The next prime is 981941. The reversal of 981928 is 829189.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 338724 = 802^2 + 582^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61363 + ... + 61378.

2⁹⁸¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

981928 is a deficient number, since it is larger than the sum of its proper divisors (859202).

981928 is a wasteful number, since it uses less digits than its factorization.

981928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122747 (or 122743 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 981928 is about 990.9228022404. The cubic root of 981928 is about 99.3939342638.

The spelling of 981928 in words is "nine hundred eighty-one thousand, nine hundred twenty-eight".