28132938 has 24 divisors (see below), whose sum is σ = 61054500. Its totient is φ = 9362304.

The previous prime is 28132919. The next prime is 28132967. The reversal of 28132938 is 83923182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27217089 + 915849 = 5217^2 + 957^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17388 + ... + 18936.

Almost surely, 2^28132938 is an apocalyptic number.

28132938 is an abundant number, since it is smaller than the sum of its proper divisors (32921562).

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

28132938 is a wasteful number, since it uses less digits than its factorization.

28132938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2563 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 28132938 is about 5304.0492079165. The cubic root of 28132938 is about 304.1387077656.

The spelling of 28132938 in words is "twenty-eight million, one hundred thirty-two thousand, nine hundred thirty-eight".