28571330 has 16 divisors (see below), whose sum is σ = 51637824. Its totient is φ = 11382000.

The previous prime is 28571329. The next prime is 28571353. The reversal of 28571330 is 3317582.

It is a junction number, because it is equal to n+sod(n) for n = 28571293 and 28571302.

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, 3182 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (3227364).

Almost surely, 2^28571330 is an apocalyptic number.

28571330 is a deficient number, since it is larger than the sum of its proper divisors (23066494).

28571330 is a wasteful number, since it uses less digits than its factorization.

28571330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11641.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28571330 is about 5345.2156177277. The cubic root of 28571330 is about 305.7103571652.

The spelling of 28571330 in words is "twenty-eight million, five hundred seventy-one thousand, three hundred thirty".