981481240 has 32 divisors (see below), whose sum is σ = 2268020880. Its totient is φ = 381981312.

The previous prime is 981481219. The next prime is 981481253. The reversal of 981481240 is 42184189.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 981481240.

It is a congruent 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, 330102 + ... + 333061.

Almost surely, 2^981481240 is an apocalyptic number.

It is an amenable number.

981481240 is an abundant number, since it is smaller than the sum of its proper divisors (1286539640).

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

981481240 is a wasteful number, since it uses less digits than its factorization.

981481240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663211 (or 663207 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 981481240 is about 31328.6009901496. The cubic root of 981481240 is about 993.7885781208.

The spelling of 981481240 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, two hundred forty".