28727554 has 8 divisors (see below), whose sum is σ = 43117308. Its totient is φ = 14355120.

The previous prime is 28727551. The next prime is 28727557. The reversal of 28727554 is 45572782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28727551) and next prime (28727557).

It can be written as a sum of positive squares in 2 ways, for example, as 28676025 + 51529 = 5355^2 + 227^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28727551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264 + ... + 7684.

Almost surely, 2^28727554 is an apocalyptic number.

28727554 is a deficient number, since it is larger than the sum of its proper divisors (14389754).

28727554 is a wasteful number, since it uses less digits than its factorization.

28727554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8660.

The product of its digits is 156800, while the sum is 40.

The square root of 28727554 is about 5359.8091383929. The cubic root of 28727554 is about 306.2665383822.

The spelling of 28727554 in words is "twenty-eight million, seven hundred twenty-seven thousand, five hundred fifty-four".