249778970 has 48 divisors (see below), whose sum is σ = 535805928. Its totient is φ = 83543040.

The previous prime is 249778967. The next prime is 249778979. The reversal of 249778970 is 79877942.

It can be written as a sum of positive squares in 4 ways, for example, as 83704201 + 166074769 = 9149^2 + 12887^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249778979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13874 + ... + 26306.

Almost surely, 2^249778970 is an apocalyptic number.

249778970 is an abundant number, since it is smaller than the sum of its proper divisors (286026958).

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

249778970 is a wasteful number, since it uses less digits than its factorization.

249778970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12495 (or 12488 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 53.

The square root of 249778970 is about 15804.3971729389. The cubic root of 249778970 is about 629.7748166408.

The spelling of 249778970 in words is "two hundred forty-nine million, seven hundred seventy-eight thousand, nine hundred seventy".