28761855 has 16 divisors (see below), whose sum is σ = 46085760. Its totient is φ = 15317408.

The previous prime is 28761847. The next prime is 28761857. The reversal of 28761855 is 55816782.

It is a cyclic number.

It is not a de Polignac number, because 28761855 - 2³ = 28761847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18124 + ... + 19646.

It is an arithmetic number, because the mean of its divisors is an integer number (2880360).

Almost surely, 2^28761855 is an apocalyptic number.

28761855 is a deficient number, since it is larger than the sum of its proper divisors (17323905).

28761855 is a wasteful number, since it uses less digits than its factorization.

28761855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790.

The product of its digits is 134400, while the sum is 42.

The square root of 28761855 is about 5363.0080178944. The cubic root of 28761855 is about 306.3883850499.

The spelling of 28761855 in words is "twenty-eight million, seven hundred sixty-one thousand, eight hundred fifty-five".