28392919 has 2 divisors, whose sum is σ = 28392920. Its totient is φ = 28392918.

The previous prime is 28392901. The next prime is 28392977. The reversal of 28392919 is 91929382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28392919 - 2⁹ = 28392407 is a prime.

It is a super-2 number, since 2×28392919² = 1612315698681122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28392619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14196459 + 14196460.

It is an arithmetic number, because the mean of its divisors is an integer number (14196460).

Almost surely, 2^28392919 is an apocalyptic number.

28392919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28392919 is an equidigital number, since it uses as much as digits as its factorization.

28392919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 28392919 is about 5328.5006333865. The cubic root of 28392919 is about 305.0727014723.

The spelling of 28392919 in words is "twenty-eight million, three hundred ninety-two thousand, nine hundred nineteen".