249689568 has 48 divisors (see below), whose sum is σ = 669392640. Its totient is φ = 81457536.

The previous prime is 249689567. The next prime is 249689597. The reversal of 249689568 is 865986942.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249689563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23158 + ... + 32181.

It is an arithmetic number, because the mean of its divisors is an integer number (13945680).

Almost surely, 2^249689568 is an apocalyptic number.

It is an amenable number.

249689568 is an abundant number, since it is smaller than the sum of its proper divisors (419703072).

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

249689568 is a wasteful number, since it uses less digits than its factorization.

249689568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55399 (or 55391 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 57.

The square root of 249689568 is about 15801.5685297378. The cubic root of 249689568 is about 629.6996704066.

The spelling of 249689568 in words is "two hundred forty-nine million, six hundred eighty-nine thousand, five hundred sixty-eight".