28135632 has 40 divisors (see below), whose sum is σ = 83068096. Its totient is φ = 8038656.

The previous prime is 28135619. The next prime is 28135643. The reversal of 28135632 is 23653182.

It is a super-2 number, since 2×28135632² = 1583227576078848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28135632.

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 in 7 ways as a sum of consecutive naturals, for example, 41533 + ... + 42204.

Almost surely, 2^28135632 is an apocalyptic number.

It is an amenable number.

28135632 is an abundant number, since it is smaller than the sum of its proper divisors (54932464).

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

28135632 is a wasteful number, since it uses less digits than its factorization.

28135632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83755 (or 83749 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 28135632 is about 5304.3031587570. The cubic root of 28135632 is about 304.1484155267.

The spelling of 28135632 in words is "twenty-eight million, one hundred thirty-five thousand, six hundred thirty-two".