28147136 has 14 divisors (see below), whose sum is σ = 55854600. Its totient is φ = 14073536.

The previous prime is 28147127. The next prime is 28147183. The reversal of 28147136 is 63174182.

It is a super-2 number, since 2×28147136² = 1584522530004992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219836 + ... + 219963.

Almost surely, 2^28147136 is an apocalyptic number.

It is an amenable number.

28147136 is a deficient number, since it is larger than the sum of its proper divisors (27707464).

28147136 is an equidigital number, since it uses as much as digits as its factorization.

28147136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439811 (or 439801 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 28147136 is about 5305.3874505073. The cubic root of 28147136 is about 304.1898629294.

The spelling of 28147136 in words is "twenty-eight million, one hundred forty-seven thousand, one hundred thirty-six".