23649538 has 32 divisors (see below), whose sum is σ = 40134528. Its totient is φ = 10358400.

The previous prime is 23649511. The next prime is 23649557. The reversal of 23649538 is 83594632.

It is a super-2 number, since 2×23649538² = 1118601295226888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23649538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141531 + ... + 141697.

It is an arithmetic number, because the mean of its divisors is an integer number (1254204).

Almost surely, 2^23649538 is an apocalyptic number.

23649538 is a deficient number, since it is larger than the sum of its proper divisors (16484990).

23649538 is a wasteful number, since it uses less digits than its factorization.

23649538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its digits is 155520, while the sum is 40.

The square root of 23649538 is about 4863.0790657772. The cubic root of 23649538 is about 287.0389859102.

The spelling of 23649538 in words is "twenty-three million, six hundred forty-nine thousand, five hundred thirty-eight".