28400963 has 2 divisors, whose sum is σ = 28400964. Its totient is φ = 28400962.

The previous prime is 28400959. The next prime is 28400971. The reversal of 28400963 is 36900482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28400963 - 2² = 28400959 is a prime.

It is a super-2 number, since 2×28400963² = 1613229398654738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28400663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14200481 + 14200482.

It is an arithmetic number, because the mean of its divisors is an integer number (14200482).

Almost surely, 2^28400963 is an apocalyptic number.

28400963 is a deficient number, since it is larger than the sum of its proper divisors (1).

28400963 is an equidigital number, since it uses as much as digits as its factorization.

28400963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28400963 is about 5329.2553888888. The cubic root of 28400963 is about 305.1015088086.

The spelling of 28400963 in words is "twenty-eight million, four hundred thousand, nine hundred sixty-three".