23928013 has 8 divisors (see below), whose sum is σ = 24343928. Its totient is φ = 23514624.

The previous prime is 23927983. The next prime is 23928017. The reversal of 23928013 is 31082932.

It can be written as a sum of positive squares in 4 ways, for example, as 1630729 + 22297284 = 1277^2 + 4722^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23928013 - 2¹³ = 23919821 is a prime.

It is a super-2 number, since 2×23928013² = 1145099612256338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23928017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31231 + ... + 31987.

It is an arithmetic number, because the mean of its divisors is an integer number (3042991).

Almost surely, 2^23928013 is an apocalyptic number.

It is an amenable number.

23928013 is a deficient number, since it is larger than the sum of its proper divisors (415915).

23928013 is an equidigital number, since it uses as much as digits as its factorization.

23928013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 23928013 is about 4891.6268255050. The cubic root of 23928013 is about 288.1612274014.

The spelling of 23928013 in words is "twenty-three million, nine hundred twenty-eight thousand, thirteen".