249223690 has 16 divisors (see below), whose sum is σ = 448814592. Its totient is φ = 99642384.

The previous prime is 249223631. The next prime is 249223691. The reversal of 249223690 is 96322942.

It is a super-2 number, since 2×249223690² = 124224895314432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249223691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23167 + ... + 32173.

It is an arithmetic number, because the mean of its divisors is an integer number (28050912).

Almost surely, 2^249223690 is an apocalyptic number.

249223690 is a deficient number, since it is larger than the sum of its proper divisors (199590902).

249223690 is a wasteful number, since it uses less digits than its factorization.

249223690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11781.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 249223690 is about 15786.8201357968. The cubic root of 249223690 is about 629.3077893067.

The spelling of 249223690 in words is "two hundred forty-nine million, two hundred twenty-three thousand, six hundred ninety".