28038401 has 2 divisors, whose sum is σ = 28038402. Its totient is φ = 28038400.

The previous prime is 28038391. The next prime is 28038421. The reversal of 28038401 is 10483082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27290176 + 748225 = 5224^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 28038401 - 2⁶ = 28038337 is a prime.

It is a Chen prime.

It is equal to p_1743731 and since 28038401 and 1743731 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28038421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14019200 + 14019201.

It is an arithmetic number, because the mean of its divisors is an integer number (14019201).

Almost surely, 2^28038401 is an apocalyptic number.

It is an amenable number.

28038401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28038401 is an equidigital number, since it uses as much as digits as its factorization.

28038401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28038401 is about 5295.1299323057. The cubic root of 28038401 is about 303.7976528849.

The spelling of 28038401 in words is "twenty-eight million, thirty-eight thousand, four hundred one".