32643428 has 12 divisors (see below), whose sum is σ = 57426432. Its totient is φ = 16235880.

The previous prime is 32643379. The next prime is 32643431. The reversal of 32643428 is 82434623.

It is a junction number, because it is equal to n+sod(n) for n = 32643394 and 32643403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20600 + ... + 22127.

It is an arithmetic number, because the mean of its divisors is an integer number (4785536).

Almost surely, 2^32643428 is an apocalyptic number.

It is an amenable number.

32643428 is a deficient number, since it is larger than the sum of its proper divisors (24783004).

32643428 is a wasteful number, since it uses less digits than its factorization.

32643428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42922 (or 42920 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 32643428 is about 5713.4427449656. The cubic root of 32643428 is about 319.5939772351.

The spelling of 32643428 in words is "thirty-two million, six hundred forty-three thousand, four hundred twenty-eight".