28520170 has 32 divisors (see below), whose sum is σ = 59020416. Its totient is φ = 9720000.

The previous prime is 28520143. The next prime is 28520179. The reversal of 28520170 is 7102582.

It is not an unprimeable number, because it can be changed into a prime (28520179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11545 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (1844388).

Almost surely, 2^28520170 is an apocalyptic number.

28520170 is an abundant number, since it is smaller than the sum of its proper divisors (30500246).

28520170 is a wasteful number, since it uses less digits than its factorization.

28520170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 28520170 is about 5340.4278854788. The cubic root of 28520170 is about 305.5277791953.

The spelling of 28520170 in words is "twenty-eight million, five hundred twenty thousand, one hundred seventy".