28811934 has 12 divisors (see below), whose sum is σ = 62425896. Its totient is φ = 9603972.

The previous prime is 28811933. The next prime is 28811953. The reversal of 28811934 is 43911882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 800314 + ... + 800349.

It is an arithmetic number, because the mean of its divisors is an integer number (5202158).

Almost surely, 2^28811934 is an apocalyptic number.

28811934 is an abundant number, since it is smaller than the sum of its proper divisors (33613962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28811934 is a wasteful number, since it uses less digits than its factorization.

28811934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600671 (or 1600668 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 28811934 is about 5367.6749156408. The cubic root of 28811934 is about 306.5661057069.

The spelling of 28811934 in words is "twenty-eight million, eight hundred eleven thousand, nine hundred thirty-four".