28851939 has 12 divisors (see below), whose sum is σ = 41860000. Its totient is φ = 19149264.

The previous prime is 28851919. The next prime is 28851947. The reversal of 28851939 is 93915882.

It is a happy number.

It is not a de Polignac number, because 28851939 - 2⁷ = 28851811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28851894 and 28851903.

It is not an unprimeable number, because it can be changed into a prime (28851919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4939 + ... + 9060.

Almost surely, 2^28851939 is an apocalyptic number.

28851939 is a deficient number, since it is larger than the sum of its proper divisors (13008061).

28851939 is a wasteful number, since it uses less digits than its factorization.

28851939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14234 (or 14231 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 28851939 is about 5371.4000968090. The cubic root of 28851939 is about 306.7079277868.

The spelling of 28851939 in words is "twenty-eight million, eight hundred fifty-one thousand, nine hundred thirty-nine".