28067432 has 8 divisors (see below), whose sum is σ = 52626450. Its totient is φ = 14033712.

The previous prime is 28067407. The next prime is 28067437. The reversal of 28067432 is 23476082.

It can be written as a sum of positive squares in only one way, i.e., 21585316 + 6482116 = 4646^2 + 2546^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28067437) by changing a digit.

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, 1754207 + ... + 1754222.

Almost surely, 2^28067432 is an apocalyptic number.

It is an amenable number.

28067432 is a deficient number, since it is larger than the sum of its proper divisors (24559018).

28067432 is a wasteful number, since it uses less digits than its factorization.

28067432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508435 (or 3508431 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28067432 is about 5297.8705155940. The cubic root of 28067432 is about 303.9024675578.

The spelling of 28067432 in words is "twenty-eight million, sixty-seven thousand, four hundred thirty-two".