28429644 has 24 divisors (see below), whose sum is σ = 70238448. Its totient is φ = 8919040.

The previous prime is 28429619. The next prime is 28429649. The reversal of 28429644 is 44692482.

It is not an unprimeable number, because it can be changed into a prime (28429649) 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 7 ways as a sum of consecutive naturals, for example, 69477 + ... + 69884.

It is an arithmetic number, because the mean of its divisors is an integer number (2926602).

Almost surely, 2^28429644 is an apocalyptic number.

It is an amenable number.

28429644 is an abundant number, since it is smaller than the sum of its proper divisors (41808804).

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

28429644 is a wasteful number, since it uses less digits than its factorization.

28429644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139385 (or 139383 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 28429644 is about 5331.9456111255. The cubic root of 28429644 is about 305.2041775384.

The spelling of 28429644 in words is "twenty-eight million, four hundred twenty-nine thousand, six hundred forty-four".