249491490 has 64 divisors (see below), whose sum is σ = 636854400. Its totient is φ = 62336000.

The previous prime is 249491483. The next prime is 249491491. The reversal of 249491490 is 94194942.

It is not an unprimeable number, because it can be changed into a prime (249491491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127036 + ... + 128984.

It is an arithmetic number, because the mean of its divisors is an integer number (9950850).

Almost surely, 2^249491490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249491490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318427200).

249491490 is an abundant number, since it is smaller than the sum of its proper divisors (387362910).

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

249491490 is a wasteful number, since it uses less digits than its factorization.

249491490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 249491490 is about 15795.2996172912. The cubic root of 249491490 is about 629.5331133902.

The spelling of 249491490 in words is "two hundred forty-nine million, four hundred ninety-one thousand, four hundred ninety".