22788001 has 2 divisors, whose sum is σ = 22788002. Its totient is φ = 22788000.

The previous prime is 22787993. The next prime is 22788013. The reversal of 22788001 is 10088722.

22788001 = 3375² + 3376².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 11390625 = 3376^2 + 3375^2 .

It is a cyclic number.

It is not a de Polignac number, because 22788001 - 2³ = 22787993 is a prime.

It is not a weakly prime, because it can be changed into another prime (22788061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11394000 + 11394001.

It is an arithmetic number, because the mean of its divisors is an integer number (11394001).

Almost surely, 2^22788001 is an apocalyptic number.

22788001 is the 3376-th centered square number.

It is an amenable number.

22788001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22788001 is an equidigital number, since it uses as much as digits as its factorization.

22788001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 22788001 is about 4773.6779321609. The cubic root of 22788001 is about 283.5102358542.

The spelling of 22788001 in words is "twenty-two million, seven hundred eighty-eight thousand, one".