28774634 has 16 divisors (see below), whose sum is σ = 50919936. Its totient is φ = 11934000.

The previous prime is 28774631. The next prime is 28774637. The reversal of 28774634 is 43647782.

It is an interprime number because it is at equal distance from previous prime (28774631) and next prime (28774637).

It is a junction number, because it is equal to n+sod(n) for n = 28774591 and 28774600.

It is not an unprimeable number, because it can be changed into a prime (28774631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32717 + ... + 33584.

It is an arithmetic number, because the mean of its divisors is an integer number (3182496).

Almost surely, 2^28774634 is an apocalyptic number.

28774634 is a deficient number, since it is larger than the sum of its proper divisors (22145302).

28774634 is a wasteful number, since it uses less digits than its factorization.

28774634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66341.

The product of its digits is 225792, while the sum is 41.

The square root of 28774634 is about 5364.1992878714. The cubic root of 28774634 is about 306.4337548339.

The spelling of 28774634 in words is "twenty-eight million, seven hundred seventy-four thousand, six hundred thirty-four".