249996870 has 48 divisors (see below), whose sum is σ = 684206640. Its totient is φ = 63156672.

The previous prime is 249996869. The next prime is 249996911. The reversal of 249996870 is 78699942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71389 + ... + 74808.

It is an arithmetic number, because the mean of its divisors is an integer number (14254305).

Almost surely, 2^249996870 is an apocalyptic number.

249996870 is an abundant number, since it is smaller than the sum of its proper divisors (434209770).

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

249996870 is a wasteful number, since it uses less digits than its factorization.

249996870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146229 (or 146226 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 249996870 is about 15811.2893212413. The cubic root of 249996870 is about 629.9578959012.

The spelling of 249996870 in words is "two hundred forty-nine million, nine hundred ninety-six thousand, eight hundred seventy".