28784734 has 16 divisors (see below), whose sum is σ = 49582080. Its totient is φ = 12395160.

The previous prime is 28784731. The next prime is 28784737. The reversal of 28784734 is 43748782.

It is an interprime number because it is at equal distance from previous prime (28784731) and next prime (28784737).

It is a super-2 number, since 2×28784734² = 1657121822901512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28784731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34014 + ... + 34849.

It is an arithmetic number, because the mean of its divisors is an integer number (3098880).

Almost surely, 2^28784734 is an apocalyptic number.

28784734 is a deficient number, since it is larger than the sum of its proper divisors (20797346).

28784734 is a wasteful number, since it uses less digits than its factorization.

28784734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68895.

The product of its digits is 301056, while the sum is 43.

The square root of 28784734 is about 5365.1406318940. The cubic root of 28784734 is about 306.4696037565.

The spelling of 28784734 in words is "twenty-eight million, seven hundred eighty-four thousand, seven hundred thirty-four".