28764422 has 4 divisors (see below), whose sum is σ = 43146636. Its totient is φ = 14382210.

The previous prime is 28764419. The next prime is 28764427. The reversal of 28764422 is 22446782.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28764427) 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 as a sum of consecutive naturals, namely, 7191104 + ... + 7191107.

It is an arithmetic number, because the mean of its divisors is an integer number (10786659).

Almost surely, 2^28764422 is an apocalyptic number.

28764422 is a deficient number, since it is larger than the sum of its proper divisors (14382214).

28764422 is a wasteful number, since it uses less digits than its factorization.

28764422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14382213.

The product of its digits is 43008, while the sum is 35.

The square root of 28764422 is about 5363.2473372016. The cubic root of 28764422 is about 306.3974998489.

The spelling of 28764422 in words is "twenty-eight million, seven hundred sixty-four thousand, four hundred twenty-two".