28947603 has 4 divisors (see below), whose sum is σ = 38596808. Its totient is φ = 19298400.

The previous prime is 28947601. The next prime is 28947619. The reversal of 28947603 is 30674982.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28947603 - 2¹ = 28947601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28947601) 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, 4824598 + ... + 4824603.

It is an arithmetic number, because the mean of its divisors is an integer number (9649202).

Almost surely, 2^28947603 is an apocalyptic number.

28947603 is a deficient number, since it is larger than the sum of its proper divisors (9649205).

28947603 is an equidigital number, since it uses as much as digits as its factorization.

28947603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9649204.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 28947603 is about 5380.2976683451. The cubic root of 28947603 is about 307.0465363217.

The spelling of 28947603 in words is "twenty-eight million, nine hundred forty-seven thousand, six hundred three".