28372901 has 2 divisors, whose sum is σ = 28372902. Its totient is φ = 28372900.

The previous prime is 28372853. The next prime is 28372931. The reversal of 28372901 is 10927382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27050401 + 1322500 = 5201^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 28372901 - 2¹⁸ = 28110757 is a prime.

It is a super-2 number, since 2×28372901² = 1610043022311602, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1763195 and since 28372901 and 1763195 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28372931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14186450 + 14186451.

It is an arithmetic number, because the mean of its divisors is an integer number (14186451).

Almost surely, 2^28372901 is an apocalyptic number.

It is an amenable number.

28372901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28372901 is an equidigital number, since it uses as much as digits as its factorization.

28372901 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28372901 is about 5326.6219126197. The cubic root of 28372901 is about 305.0009889782. Note that the first 3 decimals are identical.

The spelling of 28372901 in words is "twenty-eight million, three hundred seventy-two thousand, nine hundred one".