28645432 has 8 divisors (see below), whose sum is σ = 53710200. Its totient is φ = 14322712.

The previous prime is 28645427. The next prime is 28645469. The reversal of 28645432 is 23454682.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1790332 + ... + 1790347.

It is an arithmetic number, because the mean of its divisors is an integer number (6713775).

Almost surely, 2^28645432 is an apocalyptic number.

It is an amenable number.

28645432 is a deficient number, since it is larger than the sum of its proper divisors (25064768).

28645432 is a wasteful number, since it uses less digits than its factorization.

28645432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580685 (or 3580681 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 28645432 is about 5352.1427484700. The cubic root of 28645432 is about 305.9744236530.

The spelling of 28645432 in words is "twenty-eight million, six hundred forty-five thousand, four hundred thirty-two".