28799538 has 8 divisors (see below), whose sum is σ = 57599088. Its totient is φ = 9599844.

The previous prime is 28799509. The next prime is 28799539. The reversal of 28799538 is 83599782.

It is a sphenic number, since it is the product of 3 distinct primes.

28799538 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28799539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2399956 + ... + 2399967.

It is an arithmetic number, because the mean of its divisors is an integer number (7199886).

Almost surely, 2^28799538 is an apocalyptic number.

28799538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28799538 is a wasteful number, since it uses less digits than its factorization.

28799538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799928.

The product of its digits is 1088640, while the sum is 51.

The square root of 28799538 is about 5366.5201015183. The cubic root of 28799538 is about 306.5221338979.

The spelling of 28799538 in words is "twenty-eight million, seven hundred ninety-nine thousand, five hundred thirty-eight".