28981622 has 4 divisors (see below), whose sum is σ = 43472436. Its totient is φ = 14490810.

The previous prime is 28981607. The next prime is 28981627. The reversal of 28981622 is 22618982.

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 (28981627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7245404 + ... + 7245407.

It is an arithmetic number, because the mean of its divisors is an integer number (10868109).

Almost surely, 2^28981622 is an apocalyptic number.

28981622 is a deficient number, since it is larger than the sum of its proper divisors (14490814).

28981622 is a wasteful number, since it uses less digits than its factorization.

28981622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490813.

The product of its digits is 27648, while the sum is 38.

The square root of 28981622 is about 5383.4581822468. The cubic root of 28981622 is about 307.1667688098.

The spelling of 28981622 in words is "twenty-eight million, nine hundred eighty-one thousand, six hundred twenty-two".