249270140 has 96 divisors (see below), whose sum is σ = 625895424. Its totient is φ = 81607680.

The previous prime is 249270061. The next prime is 249270169. The reversal of 249270140 is 41072942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282500 + ... + 283380.

It is an arithmetic number, because the mean of its divisors is an integer number (6519744).

Almost surely, 2^249270140 is an apocalyptic number.

249270140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249270140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312947712).

249270140 is an abundant number, since it is smaller than the sum of its proper divisors (376625284).

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

249270140 is a wasteful number, since it uses less digits than its factorization.

249270140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 249270140 is about 15788.2912311624. The cubic root of 249270140 is about 629.3468834113.

The spelling of 249270140 in words is "two hundred forty-nine million, two hundred seventy thousand, one hundred forty".