981506260 has 72 divisors (see below), whose sum is σ = 2406831840. Its totient is φ = 335232576.

The previous prime is 981506231. The next prime is 981506299. The reversal of 981506260 is 62605189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275571 + ... + 279109.

It is an arithmetic number, because the mean of its divisors is an integer number (33428220).

Almost surely, 2^981506260 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 981506260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1203415920).

981506260 is an abundant number, since it is smaller than the sum of its proper divisors (1425325580).

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

981506260 is a wasteful number, since it uses less digits than its factorization.

981506260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845 (or 3836 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 981506260 is about 31329.0003032334. Note that the first 3 decimals coincide. The cubic root of 981506260 is about 993.7970226289.

The spelling of 981506260 in words is "nine hundred eighty-one million, five hundred six thousand, two hundred sixty".