249525388 has 96 divisors (see below), whose sum is σ = 551384064. Its totient is φ = 96380928.

The previous prime is 249525379. The next prime is 249525389. The reversal of 249525388 is 883525942.

It is not an unprimeable number, because it can be changed into a prime (249525389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1494081 + ... + 1494247.

It is an arithmetic number, because the mean of its divisors is an integer number (5743584).

Almost surely, 2^249525388 is an apocalyptic number.

249525388 is a gapful number since it is divisible by the number (28) 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 249525388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275692032).

249525388 is an abundant number, since it is smaller than the sum of its proper divisors (301858676).

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

249525388 is a wasteful number, since it uses less digits than its factorization.

249525388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 309 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 249525388 is about 15796.3726215863. The cubic root of 249525388 is about 629.5616233099.

The spelling of 249525388 in words is "two hundred forty-nine million, five hundred twenty-five thousand, three hundred eighty-eight".