28730170 has 48 divisors (see below), whose sum is σ = 63714600. Its totient is φ = 9268224.

The previous prime is 28730161. The next prime is 28730183. The reversal of 28730170 is 7103782.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17581249 + 11148921 = 4193^2 + 3339^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6606 + ... + 10054.

Almost surely, 2^28730170 is an apocalyptic number.

28730170 is an abundant number, since it is smaller than the sum of its proper divisors (34984430).

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

28730170 is a wasteful number, since it uses less digits than its factorization.

28730170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487 (or 3480 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 28730170 is about 5360.0531713781. The cubic root of 28730170 is about 306.2758345553.

It can be divided in two parts, 28730 and 170, that multiplied together give a square (4884100 = 2210²).

The spelling of 28730170 in words is "twenty-eight million, seven hundred thirty thousand, one hundred seventy".