28104938 has 8 divisors (see below), whose sum is σ = 42333060. Its totient is φ = 13993920.

The previous prime is 28104911. The next prime is 28104997. The reversal of 28104938 is 83940182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27699169 + 405769 = 5263^2 + 637^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28104898 and 28104907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28673 + ... + 29636.

Almost surely, 2^28104938 is an apocalyptic number.

28104938 is a deficient number, since it is larger than the sum of its proper divisors (14228122).

28104938 is a wasteful number, since it uses less digits than its factorization.

28104938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58552.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28104938 is about 5301.4090579769. The cubic root of 28104938 is about 304.0377737573.

The spelling of 28104938 in words is "twenty-eight million, one hundred four thousand, nine hundred thirty-eight".