249796660 has 24 divisors (see below), whose sum is σ = 525760200. Its totient is φ = 99692544.

The previous prime is 249796649. The next prime is 249796697. The reversal of 249796660 is 66697942.

249796660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39488656 + 210308004 = 6284^2 + 14502^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 4929 + ... + 22888.

It is an arithmetic number, because the mean of its divisors is an integer number (21906675).

Almost surely, 2^249796660 is an apocalyptic number.

249796660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249796660 is an abundant number, since it is smaller than the sum of its proper divisors (275963540).

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

249796660 is a wasteful number, since it uses less digits than its factorization.

249796660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28275 (or 28273 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 249796660 is about 15804.9568174038. The cubic root of 249796660 is about 629.7896837231.

The spelling of 249796660 in words is "two hundred forty-nine million, seven hundred ninety-six thousand, six hundred sixty".