28069938 has 48 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 8564832.

The previous prime is 28069919. The next prime is 28069981. The reversal of 28069938 is 83996082.

It is a junction number, because it is equal to n+sod(n) for n = 28069893 and 28069902.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32095 + ... + 32957.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^28069938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28069938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

28069938 is an abundant number, since it is smaller than the sum of its proper divisors (37974222).

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

28069938 is a wasteful number, since it uses less digits than its factorization.

28069938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 28069938 is about 5298.1070204366. The cubic root of 28069938 is about 303.9115119301.

The spelling of 28069938 in words is "twenty-eight million, sixty-nine thousand, nine hundred thirty-eight".