22429428 has 24 divisors (see below), whose sum is σ = 59812032. Its totient is φ = 6408384.

The previous prime is 22429403. The next prime is 22429493. The reversal of 22429428 is 82492422.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133425 + ... + 133592.

It is an arithmetic number, because the mean of its divisors is an integer number (2492168).

Almost surely, 2^22429428 is an apocalyptic number.

22429428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22429428 is an abundant number, since it is smaller than the sum of its proper divisors (37382604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22429428 is a wasteful number, since it uses less digits than its factorization.

22429428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267031 (or 267029 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 22429428 is about 4735.9717059966. The cubic root of 22429428 is about 282.0153404461.

The spelling of 22429428 in words is "twenty-two million, four hundred twenty-nine thousand, four hundred twenty-eight".