28731934 has 36 divisors (see below), whose sum is σ = 55129032. Its totient is φ = 11189640.

The previous prime is 28731931. The next prime is 28731949. The reversal of 28731934 is 43913782.

It is a junction number, because it is equal to n+sod(n) for n = 28731893 and 28731902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731931) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10647 + ... + 13069.

It is an arithmetic number, because the mean of its divisors is an integer number (1531362).

Almost surely, 2^28731934 is an apocalyptic number.

28731934 is a deficient number, since it is larger than the sum of its proper divisors (26397098).

28731934 is a wasteful number, since it uses less digits than its factorization.

28731934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2443 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 28731934 is about 5360.2177194588. The cubic root of 28731934 is about 306.2821027571.

The spelling of 28731934 in words is "twenty-eight million, seven hundred thirty-one thousand, nine hundred thirty-four".