28433403 has 8 divisors (see below), whose sum is σ = 42123600. Its totient is φ = 18955584.

The previous prime is 28433389. The next prime is 28433407. The reversal of 28433403 is 30433482.

It is not a de Polignac number, because 28433403 - 2⁵ = 28433371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1053089 = 28433403 / (2 + 8 + 4 + 3 + 3 + 4 + 0 + 3).

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 7 ways as a sum of consecutive naturals, for example, 526518 + ... + 526571.

It is an arithmetic number, because the mean of its divisors is an integer number (5265450).

Almost surely, 2^28433403 is an apocalyptic number.

28433403 is a deficient number, since it is larger than the sum of its proper divisors (13690197).

28433403 is a wasteful number, since it uses less digits than its factorization.

28433403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053098 (or 1053092 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 28433403 is about 5332.2980974435. The cubic root of 28433403 is about 305.2176284273.

Adding to 28433403 its reverse (30433482), we get a palindrome (58866885).

The spelling of 28433403 in words is "twenty-eight million, four hundred thirty-three thousand, four hundred three".