23281628 has 12 divisors (see below), whose sum is σ = 41511960. Its totient is φ = 11421072.

The previous prime is 23281613. The next prime is 23281663. The reversal of 23281628 is 82618232.

It is a junction number, because it is equal to n+sod(n) for n = 23281594 and 23281603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54698 + ... + 55121.

It is an arithmetic number, because the mean of its divisors is an integer number (3459330).

Almost surely, 2^23281628 is an apocalyptic number.

It is an amenable number.

23281628 is a deficient number, since it is larger than the sum of its proper divisors (18230332).

23281628 is a wasteful number, since it uses less digits than its factorization.

23281628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109876 (or 109874 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 23281628 is about 4825.1039367044. The cubic root of 23281628 is about 285.5427351599.

The spelling of 23281628 in words is "twenty-three million, two hundred eighty-one thousand, six hundred twenty-eight".