169385140 has 24 divisors (see below), whose sum is σ = 356571432. Its totient is φ = 67589760.

The previous prime is 169385129. The next prime is 169385159. The reversal of 169385140 is 41583961.

It can be written as a sum of positive squares in 4 ways, for example, as 6210064 + 163175076 = 2492^2 + 12774^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 169385140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1639 + ... + 18478.

It is an arithmetic number, because the mean of its divisors is an integer number (14857143).

Almost surely, 2^169385140 is an apocalyptic number.

169385140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169385140 is an abundant number, since it is smaller than the sum of its proper divisors (187186292).

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

169385140 is a wasteful number, since it uses less digits than its factorization.

169385140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20547 (or 20545 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 169385140 is about 13014.8046470164. The cubic root of 169385140 is about 553.2971533254.

The spelling of 169385140 in words is "one hundred sixty-nine million, three hundred eighty-five thousand, one hundred forty".