23728019 has 16 divisors (see below), whose sum is σ = 28449792. Its totient is φ = 19349088.

The previous prime is 23728013. The next prime is 23728049. The reversal of 23728019 is 91082732.

It is a cyclic number.

It is not a de Polignac number, because 23728019 - 2⁸ = 23727763 is a prime.

It is a super-2 number, since 2×23728019² = 1126037771328722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23728013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46922 + ... + 47424.

It is an arithmetic number, because the mean of its divisors is an integer number (1778112).

Almost surely, 2^23728019 is an apocalyptic number.

23728019 is a deficient number, since it is larger than the sum of its proper divisors (4721773).

23728019 is a wasteful number, since it uses less digits than its factorization.

23728019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 23728019 is about 4871.1414473407. The cubic root of 23728019 is about 287.3561483251.

The spelling of 23728019 in words is "twenty-three million, seven hundred twenty-eight thousand, nineteen".