23145028 has 6 divisors (see below), whose sum is σ = 40503806. Its totient is φ = 11572512.

The previous prime is 23145019. The next prime is 23145053. The reversal of 23145028 is 82054132.

It can be written as a sum of positive squares in only one way, i.e., 16581184 + 6563844 = 4072^2 + 2562^2 .

It is a super-2 number, since 2×23145028² = 1071384642241568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23144993 and 23145011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2893125 + ... + 2893132.

Almost surely, 2^23145028 is an apocalyptic number.

It is an amenable number.

23145028 is a deficient number, since it is larger than the sum of its proper divisors (17358778).

23145028 is a wasteful number, since it uses less digits than its factorization.

23145028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5786261 (or 5786259 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 23145028 is about 4810.9279770123. The cubic root of 23145028 is about 284.9831856295.

The spelling of 23145028 in words is "twenty-three million, one hundred forty-five thousand, twenty-eight".