28779201 has 24 divisors (see below), whose sum is σ = 45676800. Its totient is φ = 17316000.

The previous prime is 28779173. The next prime is 28779203. The reversal of 28779201 is 10297782.

It is not a de Polignac number, because 28779201 - 2⁶ = 28779137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28779203) 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, 13776 + ... + 15726.

It is an arithmetic number, because the mean of its divisors is an integer number (1903200).

Almost surely, 2^28779201 is an apocalyptic number.

It is an amenable number.

28779201 is a deficient number, since it is larger than the sum of its proper divisors (16897599).

28779201 is a wasteful number, since it uses less digits than its factorization.

28779201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 28779201 is about 5364.6249635925. The cubic root of 28779201 is about 306.4499659746.

The spelling of 28779201 in words is "twenty-eight million, seven hundred seventy-nine thousand, two hundred one".