28993622 has 8 divisors (see below), whose sum is σ = 49703376. Its totient is φ = 12425832.

The previous prime is 28993621. The next prime is 28993637. The reversal of 28993622 is 22639982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28993622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28993621) 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, 1035473 + ... + 1035500.

It is an arithmetic number, because the mean of its divisors is an integer number (6212922).

Almost surely, 2^28993622 is an apocalyptic number.

28993622 is a deficient number, since it is larger than the sum of its proper divisors (20709754).

28993622 is a wasteful number, since it uses less digits than its factorization.

28993622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070982.

The product of its digits is 93312, while the sum is 41.

The square root of 28993622 is about 5384.5725921377. The cubic root of 28993622 is about 307.2091576566.

The spelling of 28993622 in words is "twenty-eight million, nine hundred ninety-three thousand, six hundred twenty-two".