28127741 has 4 divisors (see below), whose sum is σ = 29782332. Its totient is φ = 26473152.

The previous prime is 28127731. The next prime is 28127747. The reversal of 28127741 is 14772182.

28127741 = 893² + 894² + ... + 926².

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23483716 + 4644025 = 4846^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 28127741 - 2⁶ = 28127677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28127698 and 28127707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28127747) 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, 827270 + ... + 827303.

It is an arithmetic number, because the mean of its divisors is an integer number (7445583).

Almost surely, 2^28127741 is an apocalyptic number.

It is an amenable number.

28127741 is a deficient number, since it is larger than the sum of its proper divisors (1654591).

28127741 is a wasteful number, since it uses less digits than its factorization.

28127741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654590.

The product of its digits is 6272, while the sum is 32.

The square root of 28127741 is about 5303.5592765614. The cubic root of 28127741 is about 304.1199787559.

The spelling of 28127741 in words is "twenty-eight million, one hundred twenty-seven thousand, seven hundred forty-one".