28522919 has 2 divisors, whose sum is σ = 28522920. Its totient is φ = 28522918.

The previous prime is 28522903. The next prime is 28522943. The reversal of 28522919 is 91922582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28522919 - 2⁴ = 28522903 is a prime.

It is a super-2 number, since 2×28522919² = 1627113816561122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28522969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14261459 + 14261460.

It is an arithmetic number, because the mean of its divisors is an integer number (14261460).

Almost surely, 2^28522919 is an apocalyptic number.

28522919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28522919 is an equidigital number, since it uses as much as digits as its factorization.

28522919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 28522919 is about 5340.6852556577. The cubic root of 28522919 is about 305.5375952761.

The spelling of 28522919 in words is "twenty-eight million, five hundred twenty-two thousand, nine hundred nineteen".