23749978 has 16 divisors (see below), whose sum is σ = 41405760. Its totient is φ = 10005696.

The previous prime is 23749963. The next prime is 23749987. The reversal of 23749978 is 87994732.

It is a super-2 number, since 2×23749978² = 1128122910000968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13551 + ... + 15202.

It is an arithmetic number, because the mean of its divisors is an integer number (2587860).

Almost surely, 2^23749978 is an apocalyptic number.

23749978 is a deficient number, since it is larger than the sum of its proper divisors (17655782).

23749978 is a wasteful number, since it uses less digits than its factorization.

23749978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28821.

The product of its digits is 762048, while the sum is 49.

The square root of 23749978 is about 4873.3949152516. The cubic root of 23749978 is about 287.4447651923. Note that the first 3 decimals are identical.

The spelling of 23749978 in words is "twenty-three million, seven hundred forty-nine thousand, nine hundred seventy-eight".