28768938 has 16 divisors (see below), whose sum is σ = 62768736. Its totient is φ = 8717840.

The previous prime is 28768933. The next prime is 28768951. The reversal of 28768938 is 83986782.

It is not an unprimeable number, because it can be changed into a prime (28768933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217881 + ... + 218012.

It is an arithmetic number, because the mean of its divisors is an integer number (3923046).

Almost surely, 2^28768938 is an apocalyptic number.

28768938 is an abundant number, since it is smaller than the sum of its proper divisors (33999798).

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

28768938 is a wasteful number, since it uses less digits than its factorization.

28768938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435909.

The product of its digits is 1161216, while the sum is 51.

The square root of 28768938 is about 5363.6683342653. The cubic root of 28768938 is about 306.4135337617.

The spelling of 28768938 in words is "twenty-eight million, seven hundred sixty-eight thousand, nine hundred thirty-eight".