28655211 has 16 divisors (see below), whose sum is σ = 43312640. Its totient is φ = 16705440.

The previous prime is 28655203. The next prime is 28655227. The reversal of 28655211 is 11255682.

It is not a de Polignac number, because 28655211 - 2³ = 28655203 is a prime.

It is a super-2 number, since 2×28655211² = 1642242234909042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28655261) 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, 18595 + ... + 20076.

It is an arithmetic number, because the mean of its divisors is an integer number (2707040).

Almost surely, 2^28655211 is an apocalyptic number.

28655211 is a deficient number, since it is larger than the sum of its proper divisors (14657429).

28655211 is a wasteful number, since it uses less digits than its factorization.

28655211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38706.

The product of its digits is 4800, while the sum is 30.

The square root of 28655211 is about 5353.0562298560. The cubic root of 28655211 is about 306.0092376211.

The spelling of 28655211 in words is "twenty-eight million, six hundred fifty-five thousand, two hundred eleven".