28147203 has 16 divisors (see below), whose sum is σ = 47656960. Its totient is φ = 16084008.

The previous prime is 28147201. The next prime is 28147211. The reversal of 28147203 is 30274182.

It is not a de Polignac number, because 28147203 - 2¹ = 28147201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28147201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74275 + ... + 74652.

It is an arithmetic number, because the mean of its divisors is an integer number (2978560).

Almost surely, 2^28147203 is an apocalyptic number.

28147203 is a deficient number, since it is larger than the sum of its proper divisors (19509757).

28147203 is a wasteful number, since it uses less digits than its factorization.

28147203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148943 (or 148937 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28147203 is about 5305.3937648397. The cubic root of 28147203 is about 304.1901042885.

The spelling of 28147203 in words is "twenty-eight million, one hundred forty-seven thousand, two hundred three".