28307632 has 10 divisors (see below), whose sum is σ = 54846068. Its totient is φ = 14153808.

The previous prime is 28307621. The next prime is 28307633. The reversal of 28307632 is 23670382.

It is a junction number, because it is equal to n+sod(n) for n = 28307594 and 28307603.

It is not an unprimeable number, because it can be changed into a prime (28307633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 884598 + ... + 884629.

Almost surely, 2^28307632 is an apocalyptic number.

It is an amenable number.

28307632 is a deficient number, since it is larger than the sum of its proper divisors (26538436).

28307632 is a wasteful number, since it uses less digits than its factorization.

28307632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769235 (or 1769229 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 28307632 is about 5320.4917066001. The cubic root of 28307632 is about 304.7669347322.

The spelling of 28307632 in words is "twenty-eight million, three hundred seven thousand, six hundred thirty-two".