28069432 has 8 divisors (see below), whose sum is σ = 52630200. Its totient is φ = 14034712.

The previous prime is 28069409. The next prime is 28069439. The reversal of 28069432 is 23496082.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1754332 + ... + 1754347.

It is an arithmetic number, because the mean of its divisors is an integer number (6578775).

Almost surely, 2^28069432 is an apocalyptic number.

It is an amenable number.

28069432 is a deficient number, since it is larger than the sum of its proper divisors (24560768).

28069432 is a wasteful number, since it uses less digits than its factorization.

28069432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508685 (or 3508681 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28069432 is about 5298.0592673167. The cubic root of 28069432 is about 303.9096857754.

The spelling of 28069432 in words is "twenty-eight million, sixty-nine thousand, four hundred thirty-two".