28734919 has 2 divisors, whose sum is σ = 28734920. Its totient is φ = 28734918.

The previous prime is 28734887. The next prime is 28734929. The reversal of 28734919 is 91943782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28734919 - 2⁵ = 28734887 is a prime.

It is a super-2 number, since 2×28734919² = 1651391139873122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28734929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14367459 + 14367460.

It is an arithmetic number, because the mean of its divisors is an integer number (14367460).

Almost surely, 2^28734919 is an apocalyptic number.

28734919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28734919 is an equidigital number, since it uses as much as digits as its factorization.

28734919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 28734919 is about 5360.4961524098. The cubic root of 28734919 is about 306.2927090790.

The spelling of 28734919 in words is "twenty-eight million, seven hundred thirty-four thousand, nine hundred nineteen".