28734111 has 24 divisors (see below), whose sum is σ = 48218144. Its totient is φ = 16148160.

The previous prime is 28734103. The next prime is 28734119. The reversal of 28734111 is 11143782.

It is an interprime number because it is at equal distance from previous prime (28734103) and next prime (28734119).

It is not a de Polignac number, because 28734111 - 2³ = 28734103 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 (28734119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105 + ... + 7581.

Almost surely, 2^28734111 is an apocalyptic number.

28734111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28734111 is a deficient number, since it is larger than the sum of its proper divisors (19484033).

28734111 is a wasteful number, since it uses less digits than its factorization.

28734111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551 (or 7548 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 28734111 is about 5360.4207857220. The cubic root of 28734111 is about 306.2898381605.

Adding to 28734111 its reverse (11143782), we get a palindrome (39877893).

The spelling of 28734111 in words is "twenty-eight million, seven hundred thirty-four thousand, one hundred eleven".