28127234 has 4 divisors (see below), whose sum is σ = 42190854. Its totient is φ = 14063616.

The previous prime is 28127221. The next prime is 28127249. The reversal of 28127234 is 43272182.

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

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 5593225 = 4747^2 + 2365^2 .

It is a super-2 number, since 2×28127234² = 1582282584981512, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28127197 and 28127206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7031807 + ... + 7031810.

Almost surely, 2^28127234 is an apocalyptic number.

28127234 is a deficient number, since it is larger than the sum of its proper divisors (14063620).

28127234 is a wasteful number, since it uses less digits than its factorization.

28127234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14063619.

The product of its digits is 5376, while the sum is 29.

The square root of 28127234 is about 5303.5114782566. The cubic root of 28127234 is about 304.1181514999.

The spelling of 28127234 in words is "twenty-eight million, one hundred twenty-seven thousand, two hundred thirty-four".