28914591 has 4 divisors (see below), whose sum is σ = 38552792. Its totient is φ = 19276392.

The previous prime is 28914577. The next prime is 28914593. The reversal of 28914591 is 19541982.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28914591 - 2⁵ = 28914559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28914593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4819096 + ... + 4819101.

It is an arithmetic number, because the mean of its divisors is an integer number (9638198).

Almost surely, 2^28914591 is an apocalyptic number.

28914591 is a deficient number, since it is larger than the sum of its proper divisors (9638201).

28914591 is an equidigital number, since it uses as much as digits as its factorization.

28914591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9638200.

The product of its digits is 25920, while the sum is 39.

The square root of 28914591 is about 5377.2289331960. The cubic root of 28914591 is about 306.9297727583.

The spelling of 28914591 in words is "twenty-eight million, nine hundred fourteen thousand, five hundred ninety-one".