28712034 has 24 divisors (see below), whose sum is σ = 66995292. Its totient is φ = 8834400.

The previous prime is 28712011. The next prime is 28712041. The reversal of 28712034 is 43021782.

It can be written as a sum of positive squares in 2 ways, for example, as 28355625 + 356409 = 5325^2 + 597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28711989 and 28712007.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61117 + ... + 61584.

Almost surely, 2^28712034 is an apocalyptic number.

28712034 is an abundant number, since it is smaller than the sum of its proper divisors (38283258).

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

28712034 is a wasteful number, since it uses less digits than its factorization.

28712034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122722 (or 122719 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28712034 is about 5358.3611300471. The cubic root of 28712034 is about 306.2113751649.

It can be divided in two parts, 287 and 12034, that added together give a palindrome (12321).

The spelling of 28712034 in words is "twenty-eight million, seven hundred twelve thousand, thirty-four".