249231860 has 12 divisors (see below), whose sum is σ = 523386948. Its totient is φ = 99692736.

The previous prime is 249231859. The next prime is 249231863. The reversal of 249231860 is 68132942.

It can be written as a sum of positive squares in 2 ways, for example, as 177795556 + 71436304 = 13334^2 + 8452^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 249231860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249231863) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6230777 + ... + 6230816.

It is an arithmetic number, because the mean of its divisors is an integer number (43615579).

Almost surely, 2^249231860 is an apocalyptic number.

249231860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249231860 is an abundant number, since it is smaller than the sum of its proper divisors (274155088).

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

249231860 is a wasteful number, since it uses less digits than its factorization.

249231860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12461602 (or 12461600 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 249231860 is about 15787.0788938296. The cubic root of 249231860 is about 629.3146658446.

The spelling of 249231860 in words is "two hundred forty-nine million, two hundred thirty-one thousand, eight hundred sixty".