28775403 has 12 divisors (see below), whose sum is σ = 41954328. Its totient is φ = 19003680.

The previous prime is 28775401. The next prime is 28775413. The reversal of 28775403 is 30457782.

It is not a de Polignac number, because 28775403 - 2¹ = 28775401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28775401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13978 + ... + 15903.

It is an arithmetic number, because the mean of its divisors is an integer number (3496194).

Almost surely, 2^28775403 is an apocalyptic number.

28775403 is a deficient number, since it is larger than the sum of its proper divisors (13178925).

28775403 is a wasteful number, since it uses less digits than its factorization.

28775403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29994 (or 29991 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 28775403 is about 5364.2709663103. The cubic root of 28775403 is about 306.4364846162.

The spelling of 28775403 in words is "twenty-eight million, seven hundred seventy-five thousand, four hundred three".