28921610 has 16 divisors (see below), whose sum is σ = 54799200. Its totient is φ = 10959696.

The previous prime is 28921601. The next prime is 28921639. The reversal of 28921610 is 1612982.

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 7 ways as a sum of consecutive naturals, for example, 75920 + ... + 76299.

It is an arithmetic number, because the mean of its divisors is an integer number (3424950).

Almost surely, 2^28921610 is an apocalyptic number.

28921610 is a deficient number, since it is larger than the sum of its proper divisors (25877590).

28921610 is a wasteful number, since it uses less digits than its factorization.

28921610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152245.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 28921610 is about 5377.8815531769. The cubic root of 28921610 is about 306.9546064231.

The spelling of 28921610 in words is "twenty-eight million, nine hundred twenty-one thousand, six hundred ten".