28350831 has 16 divisors (see below), whose sum is σ = 39911040. Its totient is φ = 17851680.

The previous prime is 28350821. The next prime is 28350841. The reversal of 28350831 is 13805382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28350821) and next prime (28350841).

It is not a de Polignac number, because 28350831 - 2⁶ = 28350767 is a prime.

It is a super-2 number, since 2×28350831² = 1607539236781122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28350811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27481 + ... + 28493.

It is an arithmetic number, because the mean of its divisors is an integer number (2494440).

Almost surely, 2^28350831 is an apocalyptic number.

28350831 is a deficient number, since it is larger than the sum of its proper divisors (11560209).

28350831 is a wasteful number, since it uses less digits than its factorization.

28350831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28350831 is about 5324.5498401273. The cubic root of 28350831 is about 304.9218862936.

The spelling of 28350831 in words is "twenty-eight million, three hundred fifty thousand, eight hundred thirty-one".