981449250 has 32 divisors (see below), whose sum is σ = 2449699200. Its totient is φ = 261719600.

The previous prime is 981449239. The next prime is 981449251. The reversal of 981449250 is 52944189.

It is not an unprimeable number, because it can be changed into a prime (981449251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653550 + ... + 655049.

It is an arithmetic number, because the mean of its divisors is an integer number (76553100).

Almost surely, 2^981449250 is an apocalyptic number.

981449250 is an abundant number, since it is smaller than the sum of its proper divisors (1468249950).

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

981449250 is a wasteful number, since it uses less digits than its factorization.

981449250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308619 (or 1308609 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 981449250 is about 31328.0904301555. The cubic root of 981449250 is about 993.7777809567. Note that the first 4 decimals are identical.

The spelling of 981449250 in words is "nine hundred eighty-one million, four hundred forty-nine thousand, two hundred fifty".