981930 has 32 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 257600.

The previous prime is 981919. The next prime is 981941. The reversal of 981930 is 39189.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (981919) and next prime (981941).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

981930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1900 + ... + 2360.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁹⁸¹⁹³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197504).

981930 is an abundant number, since it is smaller than the sum of its proper divisors (1413078).

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

981930 is a wasteful number, since it uses less digits than its factorization.

981930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 981930 is about 990.9238114003. The cubic root of 981930 is about 99.3940017459.

The spelling of 981930 in words is "nine hundred eighty-one thousand, nine hundred thirty".