28772199 has 32 divisors (see below), whose sum is σ = 44432640. Its totient is φ = 18385056.

The previous prime is 28772197. The next prime is 28772257. The reversal of 28772199 is 99127782.

It is not a de Polignac number, because 28772199 - 2¹ = 28772197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28772197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82744 + ... + 83090.

It is an arithmetic number, because the mean of its divisors is an integer number (1388520).

Almost surely, 2^28772199 is an apocalyptic number.

28772199 is a deficient number, since it is larger than the sum of its proper divisors (15660441).

28772199 is a wasteful number, since it uses less digits than its factorization.

28772199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 470 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 28772199 is about 5363.9723153648. The cubic root of 28772199 is about 306.4251107941.

The spelling of 28772199 in words is "twenty-eight million, seven hundred seventy-two thousand, one hundred ninety-nine".