169438390 has 32 divisors (see below), whose sum is σ = 350231040. Its totient is φ = 58370400.

The previous prime is 169438369. The next prime is 169438397. The reversal of 169438390 is 93834961.

169438390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169438397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38446 + ... + 42625.

It is an arithmetic number, because the mean of its divisors is an integer number (10944720).

Almost surely, 2^169438390 is an apocalyptic number.

169438390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169438390 is an abundant number, since it is smaller than the sum of its proper divisors (180792650).

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

169438390 is a wasteful number, since it uses less digits than its factorization.

169438390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81108.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 169438390 is about 13016.8502334474. The cubic root of 169438390 is about 553.3551276879.

The spelling of 169438390 in words is "one hundred sixty-nine million, four hundred thirty-eight thousand, three hundred ninety".