28346401 has 2 divisors, whose sum is σ = 28346402. Its totient is φ = 28346400.

The previous prime is 28346393. The next prime is 28346443. The reversal of 28346401 is 10464382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 4100625 = 4924^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 28346401 - 2³ = 28346393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28346401.

It is not a weakly prime, because it can be changed into another prime (28344401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14173200 + 14173201.

It is an arithmetic number, because the mean of its divisors is an integer number (14173201).

Almost surely, 2^28346401 is an apocalyptic number.

It is an amenable number.

28346401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28346401 is an equidigital number, since it uses as much as digits as its factorization.

28346401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28346401 is about 5324.1338262670. The cubic root of 28346401 is about 304.9060034632.

The spelling of 28346401 in words is "twenty-eight million, three hundred forty-six thousand, four hundred one".