249349688 has 16 divisors (see below), whose sum is σ = 534320880. Its totient is φ = 106864128.

The previous prime is 249349687. The next prime is 249349703. The reversal of 249349688 is 886943942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249349687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2226281 + ... + 2226392.

It is an arithmetic number, because the mean of its divisors is an integer number (33395055).

Almost surely, 2^249349688 is an apocalyptic number.

249349688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

249349688 is an abundant number, since it is smaller than the sum of its proper divisors (284971192).

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

249349688 is a wasteful number, since it uses less digits than its factorization.

249349688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452686 (or 4452682 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 53.

The square root of 249349688 is about 15790.8102388699. The cubic root of 249349688 is about 629.4138227852.

The spelling of 249349688 in words is "two hundred forty-nine million, three hundred forty-nine thousand, six hundred eighty-eight".