28774633 has 4 divisors (see below), whose sum is σ = 30025728. Its totient is φ = 27523540.

The previous prime is 28774631. The next prime is 28774637. The reversal of 28774633 is 33647782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28774633 - 2¹ = 28774631 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 625513 + ... + 625558.

It is an arithmetic number, because the mean of its divisors is an integer number (7506432).

Almost surely, 2^28774633 is an apocalyptic number.

28774633 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28774633 is a deficient number, since it is larger than the sum of its proper divisors (1251095).

28774633 is a wasteful number, since it uses less digits than its factorization.

28774633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251094.

The product of its digits is 169344, while the sum is 40.

The square root of 28774633 is about 5364.1991946608. The cubic root of 28774633 is about 306.4337512841.

The spelling of 28774633 in words is "twenty-eight million, seven hundred seventy-four thousand, six hundred thirty-three".