253680746 has 16 divisors (see below), whose sum is σ = 415359360. Its totient is φ = 115241280.

The previous prime is 253680727. The next prime is 253680773. The reversal of 253680746 is 647086352.

It is a happy number.

It is a super-2 number, since 2×253680746² = 128707841782233032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66770 + ... + 70466.

It is an arithmetic number, because the mean of its divisors is an integer number (25959960).

Almost surely, 2^253680746 is an apocalyptic number.

253680746 is a deficient number, since it is larger than the sum of its proper divisors (161678614).

253680746 is a wasteful number, since it uses less digits than its factorization.

253680746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 253680746 is about 15927.3584124926. The cubic root of 253680746 is about 633.0371080689.

The spelling of 253680746 in words is "two hundred fifty-three million, six hundred eighty thousand, seven hundred forty-six".