28738170 has 24 divisors (see below), whose sum is σ = 74719476. Its totient is φ = 7663488.

The previous prime is 28738141. The next prime is 28738181. The reversal of 28738170 is 7183782.

It can be written as a sum of positive squares in 2 ways, for example, as 23415921 + 5322249 = 4839^2 + 2307^2 .

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 11 ways as a sum of consecutive naturals, for example, 159567 + ... + 159746.

Almost surely, 2^28738170 is an apocalyptic number.

28738170 is an abundant number, since it is smaller than the sum of its proper divisors (45981306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28738170 is a wasteful number, since it uses less digits than its factorization.

28738170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319326 (or 319323 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 28738170 is about 5360.7993806894. The cubic root of 28738170 is about 306.3042597182.

The spelling of 28738170 in words is "twenty-eight million, seven hundred thirty-eight thousand, one hundred seventy".