28741784 has 16 divisors (see below), whose sum is σ = 55749600. Its totient is φ = 13875232.

The previous prime is 28741771. The next prime is 28741819. The reversal of 28741784 is 48714782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 61712 + ... + 62175.

It is an arithmetic number, because the mean of its divisors is an integer number (3484350).

Almost surely, 2^28741784 is an apocalyptic number.

It is an amenable number.

28741784 is a deficient number, since it is larger than the sum of its proper divisors (27007816).

28741784 is a wasteful number, since it uses less digits than its factorization.

28741784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123922 (or 123918 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 28741784 is about 5361.1364466874. The cubic root of 28741784 is about 306.3170990557.

The spelling of 28741784 in words is "twenty-eight million, seven hundred forty-one thousand, seven hundred eighty-four".