28774001 has 2 divisors, whose sum is σ = 28774002. Its totient is φ = 28774000.

The previous prime is 28773971. The next prime is 28774027. The reversal of 28774001 is 10047782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28344976 + 429025 = 5324^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 28774001 - 2⁶ = 28773937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (28774051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14387000 + 14387001.

It is an arithmetic number, because the mean of its divisors is an integer number (14387001).

Almost surely, 2^28774001 is an apocalyptic number.

It is an amenable number.

28774001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28774001 is an equidigital number, since it uses as much as digits as its factorization.

28774001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 28774001 is about 5364.1402852647. The cubic root of 28774001 is about 306.4315077855.

The spelling of 28774001 in words is "twenty-eight million, seven hundred seventy-four thousand, one".