249664390 has 16 divisors (see below), whose sum is σ = 463893120. Its totient is φ = 96644160.

The previous prime is 249664357. The next prime is 249664403. The reversal of 249664390 is 93466942.

249664390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402375 + ... + 402994.

It is an arithmetic number, because the mean of its divisors is an integer number (28993320).

Almost surely, 2^249664390 is an apocalyptic number.

249664390 is a deficient number, since it is larger than the sum of its proper divisors (214228730).

249664390 is a wasteful number, since it uses less digits than its factorization.

249664390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805407.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 249664390 is about 15800.7718165917. The cubic root of 249664390 is about 629.6785039753.

The spelling of 249664390 in words is "two hundred forty-nine million, six hundred sixty-four thousand, three hundred ninety".