168354440 has 64 divisors (see below), whose sum is σ = 409579200. Its totient is φ = 62062848.

The previous prime is 168354413. The next prime is 168354443. The reversal of 168354440 is 44453861.

It is a self number, because there is not a number n which added to its sum of digits gives 168354440.

It is not an unprimeable number, because it can be changed into a prime (168354443) 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, 25127 + ... + 31113.

It is an arithmetic number, because the mean of its divisors is an integer number (6399675).

Almost surely, 2^168354440 is an apocalyptic number.

168354440 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 168354440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204789600).

168354440 is an abundant number, since it is smaller than the sum of its proper divisors (241224760).

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

168354440 is a wasteful number, since it uses less digits than its factorization.

168354440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054 (or 6050 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 168354440 is about 12975.1470126546. The cubic root of 168354440 is about 552.1726075766.

The spelling of 168354440 in words is "one hundred sixty-eight million, three hundred fifty-four thousand, four hundred forty".