169499420 has 48 divisors (see below), whose sum is σ = 374068800. Its totient is φ = 64390656.

The previous prime is 169499417. The next prime is 169499423. The reversal of 169499420 is 24994961.

It is an interprime number because it is at equal distance from previous prime (169499417) and next prime (169499423).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169499423) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 67304 + ... + 69776.

It is an arithmetic number, because the mean of its divisors is an integer number (7793100).

Almost surely, 2^169499420 is an apocalyptic number.

169499420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169499420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187034400).

169499420 is an abundant number, since it is smaller than the sum of its proper divisors (204569380).

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

169499420 is a wasteful number, since it uses less digits than its factorization.

169499420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654 (or 2652 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 169499420 is about 13019.1942915067. The cubic root of 169499420 is about 553.4215573590.

The spelling of 169499420 in words is "one hundred sixty-nine million, four hundred ninety-nine thousand, four hundred twenty".