28707735 has 32 divisors (see below), whose sum is σ = 53033472. Its totient is φ = 12988800.

The previous prime is 28707677. The next prime is 28707737. The reversal of 28707735 is 53770782.

It is not a de Polignac number, because 28707735 - 2¹¹ = 28705687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28707693 and 28707702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28707737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9252 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (1657296).

Almost surely, 2^28707735 is an apocalyptic number.

28707735 is a deficient number, since it is larger than the sum of its proper divisors (24325737).

28707735 is a wasteful number, since it uses less digits than its factorization.

28707735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823.

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 28707735 is about 5357.9599662558. The cubic root of 28707735 is about 306.1960915802.

The spelling of 28707735 in words is "twenty-eight million, seven hundred seven thousand, seven hundred thirty-five".