28378170 has 24 divisors (see below), whose sum is σ = 73783476. Its totient is φ = 7567488.

The previous prime is 28378139. The next prime is 28378171. The reversal of 28378170 is 7187382.

It can be written as a sum of positive squares in 2 ways, for example, as 27846729 + 531441 = 5277^2 + 729^2 .

It is not an unprimeable number, because it can be changed into a prime (28378171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157567 + ... + 157746.

Almost surely, 2^28378170 is an apocalyptic number.

28378170 is an abundant number, since it is smaller than the sum of its proper divisors (45405306).

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

28378170 is a wasteful number, since it uses less digits than its factorization.

28378170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315326 (or 315323 counting only the distinct ones).

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

The square root of 28378170 is about 5327.1164807990. The cubic root of 28378170 is about 305.0198679165.

The spelling of 28378170 in words is "twenty-eight million, three hundred seventy-eight thousand, one hundred seventy".