28414891 has 2 divisors, whose sum is σ = 28414892. Its totient is φ = 28414890.

The previous prime is 28414843. The next prime is 28414907. The reversal of 28414891 is 19841482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28414891 - 2¹³ = 28406699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28414891.

It is not a weakly prime, because it can be changed into another prime (28414831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14207445 + 14207446.

It is an arithmetic number, because the mean of its divisors is an integer number (14207446).

Almost surely, 2^28414891 is an apocalyptic number.

28414891 is a deficient number, since it is larger than the sum of its proper divisors (1).

28414891 is an equidigital number, since it uses as much as digits as its factorization.

28414891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 28414891 is about 5330.5619778781. The cubic root of 28414891 is about 305.1513751852.

The spelling of 28414891 in words is "twenty-eight million, four hundred fourteen thousand, eight hundred ninety-one".