249405888 has 28 divisors (see below), whose sum is σ = 659886920. Its totient is φ = 83135232.

The previous prime is 249405883. The next prime is 249405931. The reversal of 249405888 is 888504942.

249405888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249405883) 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, 649303 + ... + 649686.

It is an arithmetic number, because the mean of its divisors is an integer number (23567390).

Almost surely, 2^249405888 is an apocalyptic number.

It is an amenable number.

249405888 is an abundant number, since it is smaller than the sum of its proper divisors (410481032).

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

249405888 is a wasteful number, since it uses less digits than its factorization.

249405888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299004 (or 1298994 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The square root of 249405888 is about 15792.5896546450. The cubic root of 249405888 is about 629.4611063143.

The spelling of 249405888 in words is "two hundred forty-nine million, four hundred five thousand, eight hundred eighty-eight".