28422629 has 4 divisors (see below), whose sum is σ = 29339520. Its totient is φ = 27505740.

The previous prime is 28422619. The next prime is 28422631. The reversal of 28422629 is 92622482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28422629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28422619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458399 + ... + 458460.

It is an arithmetic number, because the mean of its divisors is an integer number (7334880).

Almost surely, 2^28422629 is an apocalyptic number.

It is an amenable number.

28422629 is a deficient number, since it is larger than the sum of its proper divisors (916891).

28422629 is an equidigital number, since it uses as much as digits as its factorization.

28422629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916890.

The product of its digits is 27648, while the sum is 35.

The square root of 28422629 is about 5331.2877431255. The cubic root of 28422629 is about 305.1790724823.

The spelling of 28422629 in words is "twenty-eight million, four hundred twenty-two thousand, six hundred twenty-nine".