28199764 has 24 divisors (see below), whose sum is σ = 50513120. Its totient is φ = 13771296.

The previous prime is 28199749. The next prime is 28199767. The reversal of 28199764 is 46799182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28199767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36874 + ... + 37630.

Almost surely, 2^28199764 is an apocalyptic number.

It is an amenable number.

28199764 is a deficient number, since it is larger than the sum of its proper divisors (22313356).

28199764 is a wasteful number, since it uses less digits than its factorization.

28199764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 965 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 28199764 is about 5310.3449982087. The cubic root of 28199764 is about 304.3793308374.

The spelling of 28199764 in words is "twenty-eight million, one hundred ninety-nine thousand, seven hundred sixty-four".