28433405 has 96 divisors (see below), whose sum is σ = 50595840. Its totient is φ = 14826240.

The previous prime is 28433389. The next prime is 28433407. The reversal of 28433405 is 50433482.

It is not a de Polignac number, because 28433405 - 2⁴ = 28433389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28433407) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1236224 + ... + 1236246.

It is an arithmetic number, because the mean of its divisors is an integer number (527040).

Almost surely, 2^28433405 is an apocalyptic number.

It is an amenable number.

28433405 is a deficient number, since it is larger than the sum of its proper divisors (22162435).

28433405 is a wasteful number, since it uses less digits than its factorization.

28433405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 28433405 is about 5332.2982849799. The cubic root of 28433405 is about 305.2176355836.

Adding to 28433405 its reverse (50433482), we get a palindrome (78866887).

The spelling of 28433405 in words is "twenty-eight million, four hundred thirty-three thousand, four hundred five".