28201995 has 12 divisors (see below), whose sum is σ = 48883536. Its totient is φ = 15041040.

The previous prime is 28201993. The next prime is 28202011. The reversal of 28201995 is 59910282.

It is not a de Polignac number, because 28201995 - 2¹ = 28201993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28201993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313311 + ... + 313400.

It is an arithmetic number, because the mean of its divisors is an integer number (4073628).

Almost surely, 2^28201995 is an apocalyptic number.

28201995 is a deficient number, since it is larger than the sum of its proper divisors (20681541).

28201995 is a wasteful number, since it uses less digits than its factorization.

28201995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626722 (or 626719 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 28201995 is about 5310.5550557357. Note that the first 3 decimals coincide. The cubic root of 28201995 is about 304.3873575285.

The spelling of 28201995 in words is "twenty-eight million, two hundred one thousand, nine hundred ninety-five".