23728401 has 12 divisors (see below), whose sum is σ = 34386612. Its totient is φ = 15767136.

The previous prime is 23728391. The next prime is 23728403. The reversal of 23728401 is 10482732.

23728401 is a `hidden beast` number, since 237 + 28 + 401 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13133376 + 10595025 = 3624^2 + 3255^2 .

It is not a de Polignac number, because 23728401 - 2¹³ = 23720209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23728403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1306 + ... + 7011.

It is an arithmetic number, because the mean of its divisors is an integer number (2865551).

Almost surely, 2^23728401 is an apocalyptic number.

It is an amenable number.

23728401 is a deficient number, since it is larger than the sum of its proper divisors (10658211).

23728401 is a wasteful number, since it uses less digits than its factorization.

23728401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640 (or 8637 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23728401 is about 4871.1806577051. The cubic root of 23728401 is about 287.3576903763.

The spelling of 23728401 in words is "twenty-three million, seven hundred twenty-eight thousand, four hundred one".