28585403 has 12 divisors (see below), whose sum is σ = 35910000. Its totient is φ = 22273680.

The previous prime is 28585399. The next prime is 28585409. The reversal of 28585403 is 30458582.

It is not a de Polignac number, because 28585403 - 2² = 28585399 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28585409) 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, 16028 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (2992500).

Almost surely, 2^28585403 is an apocalyptic number.

28585403 is a deficient number, since it is larger than the sum of its proper divisors (7324597).

28585403 is a wasteful number, since it uses less digits than its factorization.

28585403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33778 (or 33767 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 28585403 is about 5346.5318665468. The cubic root of 28585403 is about 305.7605421546.

The spelling of 28585403 in words is "twenty-eight million, five hundred eighty-five thousand, four hundred three".