28867938 has 48 divisors (see below), whose sum is σ = 67223520. Its totient is φ = 8229760.

The previous prime is 28867903. The next prime is 28867939. The reversal of 28867938 is 83976882.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (28867939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11173 + ... + 13511.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^28867938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28867938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33611760).

28867938 is an abundant number, since it is smaller than the sum of its proper divisors (38355582).

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

28867938 is a wasteful number, since it uses less digits than its factorization.

28867938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383 (or 2372 counting only the distinct ones).

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

The square root of 28867938 is about 5372.8891669194. The cubic root of 28867938 is about 306.7646092852.

The spelling of 28867938 in words is "twenty-eight million, eight hundred sixty-seven thousand, nine hundred thirty-eight".