28371603 has 24 divisors (see below), whose sum is σ = 42150864. Its totient is φ = 16873920.

The previous prime is 28371583. The next prime is 28371647. The reversal of 28371603 is 30617382.

It is not a de Polignac number, because 28371603 - 2⁵ = 28371571 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is the 5327-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371683) by changing a digit.

It is a nontrivial repunit in base 5326.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37101 + ... + 37857.

It is an arithmetic number, because the mean of its divisors is an integer number (1756286).

Almost surely, 2^28371603 is an apocalyptic number.

28371603 is a deficient number, since it is larger than the sum of its proper divisors (13779261).

28371603 is a wasteful number, since it uses less digits than its factorization.

28371603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 28371603 is about 5326.5000704027. The cubic root of 28371603 is about 304.9963378580.

Adding to 28371603 its reverse (30617382), we get a palindrome (58988985).

The spelling of 28371603 in words is "twenty-eight million, three hundred seventy-one thousand, six hundred three".