28406323 has 12 divisors (see below), whose sum is σ = 32234944. Its totient is φ = 24987600.

The previous prime is 28406309. The next prime is 28406327. The reversal of 28406323 is 32360482.

It is not a de Polignac number, because 28406323 - 2⁵ = 28406291 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28406291 and 28406300.

It is not an unprimeable number, because it can be changed into a prime (28406327) 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 11 ways as a sum of consecutive naturals, for example, 36 + ... + 7537.

Almost surely, 2^28406323 is an apocalyptic number.

28406323 is a deficient number, since it is larger than the sum of its proper divisors (3828621).

28406323 is a wasteful number, since it uses less digits than its factorization.

28406323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626 (or 7615 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 28406323 is about 5329.7582496770. The cubic root of 28406323 is about 305.1207011299.

It can be divided in two parts, 28 and 406323, that added together give a triangular number (406351 = T₉₀₁).

The spelling of 28406323 in words is "twenty-eight million, four hundred six thousand, three hundred twenty-three".