28472401 has 2 divisors, whose sum is σ = 28472402. Its totient is φ = 28472400.

The previous prime is 28472377. The next prime is 28472419. The reversal of 28472401 is 10427482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 4511376 = 4895^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 28472401 - 2⁵ = 28472369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28472401.

It is not a weakly prime, because it can be changed into another prime (28472201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14236200 + 14236201.

It is an arithmetic number, because the mean of its divisors is an integer number (14236201).

Almost surely, 2^28472401 is an apocalyptic number.

It is an amenable number.

28472401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28472401 is an equidigital number, since it uses as much as digits as its factorization.

28472401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 28472401 is about 5335.9536167399. The cubic root of 28472401 is about 305.3571056869.

Adding to 28472401 its reverse (10427482), we get a palindrome (38899883).

The spelling of 28472401 in words is "twenty-eight million, four hundred seventy-two thousand, four hundred one".