23428149 has 4 divisors (see below), whose sum is σ = 31237536. Its totient is φ = 15618764.

The previous prime is 23428147. The next prime is 23428169. The reversal of 23428149 is 94182432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23428149 - 2¹ = 23428147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23428147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3904689 + ... + 3904694.

It is an arithmetic number, because the mean of its divisors is an integer number (7809384).

Almost surely, 2^23428149 is an apocalyptic number.

It is an amenable number.

23428149 is a deficient number, since it is larger than the sum of its proper divisors (7809387).

23428149 is an equidigital number, since it uses as much as digits as its factorization.

23428149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7809386.

The product of its digits is 13824, while the sum is 33.

The square root of 23428149 is about 4840.2633192834. The cubic root of 23428149 is about 286.1404961165.

The spelling of 23428149 in words is "twenty-three million, four hundred twenty-eight thousand, one hundred forty-nine".