23028639 has 8 divisors (see below), whose sum is σ = 31763760. Its totient is φ = 14822976.

The previous prime is 23028631. The next prime is 23028667. The reversal of 23028639 is 93682032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23028639 - 2³ = 23028631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23028631) by changing a digit.

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, 132262 + ... + 132435.

It is an arithmetic number, because the mean of its divisors is an integer number (3970470).

Almost surely, 2^23028639 is an apocalyptic number.

23028639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

23028639 is a deficient number, since it is larger than the sum of its proper divisors (8735121).

23028639 is a wasteful number, since it uses less digits than its factorization.

23028639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264729.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 23028639 is about 4798.8164165761. The cubic root of 23028639 is about 284.5046859927.

The spelling of 23028639 in words is "twenty-three million, twenty-eight thousand, six hundred thirty-nine".