28707855 has 24 divisors (see below), whose sum is σ = 50491056. Its totient is φ = 13918080.

The previous prime is 28707827. The next prime is 28707857. The reversal of 28707855 is 55870782.

It is a happy number.

It is not a de Polignac number, because 28707855 - 2⁵ = 28707823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28707857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6094 + ... + 9723.

It is an arithmetic number, because the mean of its divisors is an integer number (2103794).

Almost surely, 2^28707855 is an apocalyptic number.

28707855 is a deficient number, since it is larger than the sum of its proper divisors (21783201).

28707855 is a wasteful number, since it uses less digits than its factorization.

28707855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15847 (or 15836 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 28707855 is about 5357.9711645361. The cubic root of 28707855 is about 306.1965182187.

The spelling of 28707855 in words is "twenty-eight million, seven hundred seven thousand, eight hundred fifty-five".