23378401 has 4 divisors (see below), whose sum is σ = 23408532. Its totient is φ = 23348272.

The previous prime is 23378393. The next prime is 23378423. The reversal of 23378401 is 10487332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15397776 + 7980625 = 3924^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 23378401 - 2³ = 23378393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23378401.

It is not an unprimeable number, because it can be changed into a prime (23378461) 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 3 ways as a sum of consecutive naturals, for example, 13870 + ... + 15463.

It is an arithmetic number, because the mean of its divisors is an integer number (5852133).

Almost surely, 2^23378401 is an apocalyptic number.

It is an amenable number.

23378401 is a deficient number, since it is larger than the sum of its proper divisors (30131).

23378401 is an equidigital number, since it uses as much as digits as its factorization.

23378401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30130.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 23378401 is about 4835.1216117074. The cubic root of 23378401 is about 285.9378196280.

It can be divided in two parts, 2337840 and 1, that added together give a square (2337841 = 1529²).

The spelling of 23378401 in words is "twenty-three million, three hundred seventy-eight thousand, four hundred one".