167990478 has 16 divisors (see below), whose sum is σ = 336251520. Its totient is φ = 55951736.

The previous prime is 167990467. The next prime is 167990479. The reversal of 167990478 is 874099761.

167990478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 167990478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167990479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2700 + ... + 18527.

It is an arithmetic number, because the mean of its divisors is an integer number (21015720).

Almost surely, 2^167990478 is an apocalyptic number.

167990478 is an abundant number, since it is smaller than the sum of its proper divisors (168261042).

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

167990478 is a wasteful number, since it uses less digits than its factorization.

167990478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22551.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 167990478 is about 12961.1140724862. The cubic root of 167990478 is about 551.7744102872.

The spelling of 167990478 in words is "one hundred sixty-seven million, nine hundred ninety thousand, four hundred seventy-eight".