28129622 has 4 divisors (see below), whose sum is σ = 42194436. Its totient is φ = 14064810.

The previous prime is 28129603. The next prime is 28129631. The reversal of 28129622 is 22692182.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7032404 + ... + 7032407.

It is an arithmetic number, because the mean of its divisors is an integer number (10548609).

Almost surely, 2^28129622 is an apocalyptic number.

28129622 is a deficient number, since it is larger than the sum of its proper divisors (14064814).

28129622 is a wasteful number, since it uses less digits than its factorization.

28129622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14064813.

The product of its digits is 6912, while the sum is 32.

The square root of 28129622 is about 5303.7366073364. The cubic root of 28129622 is about 304.1267577922.

The spelling of 28129622 in words is "twenty-eight million, one hundred twenty-nine thousand, six hundred twenty-two".