28706434 has 16 divisors (see below), whose sum is σ = 44697600. Its totient is φ = 13812480.

The previous prime is 28706429. The next prime is 28706441. The reversal of 28706434 is 43460782.

It is a self number, because there is not a number n which added to its sum of digits gives 28706434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10767 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (2793600).

Almost surely, 2^28706434 is an apocalyptic number.

28706434 is a deficient number, since it is larger than the sum of its proper divisors (15991166).

28706434 is a wasteful number, since it uses less digits than its factorization.

28706434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 28706434 is about 5357.8385567316. The cubic root of 28706434 is about 306.1914660309.

The spelling of 28706434 in words is "twenty-eight million, seven hundred six thousand, four hundred thirty-four".