28354931 has 16 divisors (see below), whose sum is σ = 31941888. Its totient is φ = 24948000.

The previous prime is 28354919. The next prime is 28354939. The reversal of 28354931 is 13945382.

It is not a de Polignac number, because 28354931 - 2¹⁴ = 28338547 is a prime.

It is a super-2 number, since 2×28354931² = 1608004224029522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28354891 and 28354900.

It is not an unprimeable number, because it can be changed into a prime (28354939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71225 + ... + 71621.

It is an arithmetic number, because the mean of its divisors is an integer number (1996368).

Almost surely, 2^28354931 is an apocalyptic number.

28354931 is a deficient number, since it is larger than the sum of its proper divisors (3586957).

28354931 is a wasteful number, since it uses less digits than its factorization.

28354931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602.

The product of its digits is 25920, while the sum is 35.

The square root of 28354931 is about 5324.9348352820. The cubic root of 28354931 is about 304.9365845044.

The spelling of 28354931 in words is "twenty-eight million, three hundred fifty-four thousand, nine hundred thirty-one".