168564440 has 32 divisors (see below), whose sum is σ = 413750160. Its totient is φ = 61296000.

The previous prime is 168564421. The next prime is 168564457. The reversal of 168564440 is 44465861.

It is a junction number, because it is equal to n+sod(n) for n = 168564394 and 168564403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191111 + ... + 191990.

Almost surely, 2^168564440 is an apocalyptic number.

168564440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168564440 is an abundant number, since it is smaller than the sum of its proper divisors (245185720).

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

168564440 is a wasteful number, since it uses less digits than its factorization.

168564440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383123 (or 383119 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 168564440 is about 12983.2368845369. The cubic root of 168564440 is about 552.4020997273.

The spelling of 168564440 in words is "one hundred sixty-eight million, five hundred sixty-four thousand, four hundred forty".