249049520 has 40 divisors (see below), whose sum is σ = 604220256. Its totient is φ = 95287808.

The previous prime is 249049517. The next prime is 249049523. The reversal of 249049520 is 25940942.

It is an interprime number because it is at equal distance from previous prime (249049517) and next prime (249049523).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (249049523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65837 + ... + 69516.

Almost surely, 2^249049520 is an apocalyptic number.

249049520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249049520 is an abundant number, since it is smaller than the sum of its proper divisors (355170736).

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

249049520 is a wasteful number, since it uses less digits than its factorization.

249049520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135389 (or 135383 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 249049520 is about 15781.3028612976. The cubic root of 249049520 is about 629.1611578737.

The spelling of 249049520 in words is "two hundred forty-nine million, forty-nine thousand, five hundred twenty".