28959919 has 2 divisors, whose sum is σ = 28959920. Its totient is φ = 28959918.

The previous prime is 28959913. The next prime is 28959923. The reversal of 28959919 is 91995982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28959919 - 2¹¹ = 28957871 is a prime.

It is a super-2 number, since 2×28959919² = 1677353816973122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28959913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14479959 + 14479960.

It is an arithmetic number, because the mean of its divisors is an integer number (14479960).

Almost surely, 2^28959919 is an apocalyptic number.

28959919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28959919 is an equidigital number, since it uses as much as digits as its factorization.

28959919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 52.

The square root of 28959919 is about 5381.4420929710. The cubic root of 28959919 is about 307.0900753206.

The spelling of 28959919 in words is "twenty-eight million, nine hundred fifty-nine thousand, nine hundred nineteen".