170887940 has 12 divisors (see below), whose sum is σ = 358864716. Its totient is φ = 68355168.

The previous prime is 170887931. The next prime is 170887943. The reversal of 170887940 is 49788071.

It can be written as a sum of positive squares in 2 ways, for example, as 91891396 + 78996544 = 9586^2 + 8888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 170887891 and 170887900.

It is not an unprimeable number, because it can be changed into a prime (170887943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4272179 + ... + 4272218.

It is an arithmetic number, because the mean of its divisors is an integer number (29905393).

Almost surely, 2^170887940 is an apocalyptic number.

170887940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

170887940 is an abundant number, since it is smaller than the sum of its proper divisors (187976776).

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

170887940 is a wasteful number, since it uses less digits than its factorization.

170887940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544406 (or 8544404 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 170887940 is about 13072.4114072347. The cubic root of 170887940 is about 554.9286383912.

The spelling of 170887940 in words is "one hundred seventy million, eight hundred eighty-seven thousand, nine hundred forty".