28025930 has 8 divisors (see below), whose sum is σ = 50446692. Its totient is φ = 11210368.

The previous prime is 28025929. The next prime is 28025947. The reversal of 28025930 is 3952082.

It can be written as a sum of positive squares in 2 ways, for example, as 27573001 + 452929 = 5251^2 + 673^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28025893 and 28025902.

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, 1401287 + ... + 1401306.

Almost surely, 2^28025930 is an apocalyptic number.

28025930 is a deficient number, since it is larger than the sum of its proper divisors (22420762).

28025930 is a wasteful number, since it uses less digits than its factorization.

28025930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802600.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 28025930 is about 5293.9522098334. The cubic root of 28025930 is about 303.7526048764.

The spelling of 28025930 in words is "twenty-eight million, twenty-five thousand, nine hundred thirty".