28821746 has 16 divisors (see below), whose sum is σ = 45807360. Its totient is φ = 13562640.

The previous prime is 28821743. The next prime is 28821757. The reversal of 28821746 is 64712882.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (28821743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3551 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (2862960).

Almost surely, 2^28821746 is an apocalyptic number.

28821746 is a deficient number, since it is larger than the sum of its proper divisors (16985614).

28821746 is a wasteful number, since it uses less digits than its factorization.

28821746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009.

The product of its digits is 43008, while the sum is 38.

The square root of 28821746 is about 5368.5888276157. The cubic root of 28821746 is about 306.6009024596.

The spelling of 28821746 in words is "twenty-eight million, eight hundred twenty-one thousand, seven hundred forty-six".