28644970 has 32 divisors (see below), whose sum is σ = 54820800. Its totient is φ = 10745856.

The previous prime is 28644947. The next prime is 28644991. The reversal of 28644970 is 7944682.

28644970 = T₂₁ + T₂₂ + ... + T₅₅₅.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19626 + ... + 21034.

It is an arithmetic number, because the mean of its divisors is an integer number (1713150).

Almost surely, 2^28644970 is an apocalyptic number.

28644970 is a deficient number, since it is larger than the sum of its proper divisors (26175830).

28644970 is a wasteful number, since it uses less digits than its factorization.

28644970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28644970 is about 5352.0995880122. The cubic root of 28644970 is about 305.9727787026.

The spelling of 28644970 in words is "twenty-eight million, six hundred forty-four thousand, nine hundred seventy".