28712735 has 16 divisors (see below), whose sum is σ = 35212320. Its totient is φ = 22471680.

The previous prime is 28712713. The next prime is 28712753. The reversal of 28712735 is 53721782.

It is not a de Polignac number, because 28712735 - 2²⁰ = 27664159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28712695 and 28712704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50000 + ... + 50570.

It is an arithmetic number, because the mean of its divisors is an integer number (2200770).

Almost surely, 2^28712735 is an apocalyptic number.

28712735 is a deficient number, since it is larger than the sum of its proper divisors (6499585).

28712735 is a wasteful number, since it uses less digits than its factorization.

28712735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its digits is 23520, while the sum is 35.

The square root of 28712735 is about 5358.4265414392. The cubic root of 28712735 is about 306.2138671795.

The spelling of 28712735 in words is "twenty-eight million, seven hundred twelve thousand, seven hundred thirty-five".