28776001 has 2 divisors, whose sum is σ = 28776002. Its totient is φ = 28776000.

The previous prime is 28775993. The next prime is 28776023. The reversal of 28776001 is 10067782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25765776 + 3010225 = 5076^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 28776001 - 2³ = 28775993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28776101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14388000 + 14388001.

It is an arithmetic number, because the mean of its divisors is an integer number (14388001).

Almost surely, 2^28776001 is an apocalyptic number.

It is an amenable number.

28776001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28776001 is an equidigital number, since it uses as much as digits as its factorization.

28776001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 28776001 is about 5364.3267051886. The cubic root of 28776001 is about 306.4386073522.

The spelling of 28776001 in words is "twenty-eight million, seven hundred seventy-six thousand, one".