28533478 has 16 divisors (see below), whose sum is σ = 47013120. Its totient is φ = 12927816.

The previous prime is 28533469. The next prime is 28533509. The reversal of 28533478 is 87433582.

It is a self number, because there is not a number n which added to its sum of digits gives 28533478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15450 + ... + 17197.

It is an arithmetic number, because the mean of its divisors is an integer number (2938320).

Almost surely, 2^28533478 is an apocalyptic number.

28533478 is a deficient number, since it is larger than the sum of its proper divisors (18479642).

28533478 is a wasteful number, since it uses less digits than its factorization.

28533478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32691.

The product of its digits is 161280, while the sum is 40.

The square root of 28533478 is about 5341.6737077437. The cubic root of 28533478 is about 305.5752933047.

The spelling of 28533478 in words is "twenty-eight million, five hundred thirty-three thousand, four hundred seventy-eight".