28856734 has 4 divisors (see below), whose sum is σ = 43285104. Its totient is φ = 14428366.

The previous prime is 28856719. The next prime is 28856749. The reversal of 28856734 is 43765882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43765882 = 2 ⋅21882941.

It is an interprime number because it is at equal distance from previous prime (28856719) and next prime (28856749).

It is a super-2 number, since 2×28856734² = 1665422194293512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7214182 + ... + 7214185.

It is an arithmetic number, because the mean of its divisors is an integer number (10821276).

Almost surely, 2^28856734 is an apocalyptic number.

28856734 is a deficient number, since it is larger than the sum of its proper divisors (14428370).

28856734 is a wasteful number, since it uses less digits than its factorization.

28856734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428369.

The product of its digits is 322560, while the sum is 43.

The square root of 28856734 is about 5371.8464237169. The cubic root of 28856734 is about 306.7249177835.

The spelling of 28856734 in words is "twenty-eight million, eight hundred fifty-six thousand, seven hundred thirty-four".