28455403 has 4 divisors (see below), whose sum is σ = 28469728. Its totient is φ = 28441080.

The previous prime is 28455397. The next prime is 28455421. The reversal of 28455403 is 30455482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30455482 = 2 ⋅15227741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28455403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28455443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3588 + ... + 8353.

It is an arithmetic number, because the mean of its divisors is an integer number (7117432).

Almost surely, 2^28455403 is an apocalyptic number.

28455403 is a deficient number, since it is larger than the sum of its proper divisors (14325).

28455403 is a wasteful number, since it uses less digits than its factorization.

28455403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14324.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 28455403 is about 5334.3605989847. The cubic root of 28455403 is about 305.2963276101.

The spelling of 28455403 in words is "twenty-eight million, four hundred fifty-five thousand, four hundred three".