439720164 has 288 divisors, whose sum is σ = 1386927360. Its totient is φ = 120434688.

The previous prime is 439720157. The next prime is 439720189. The reversal of 439720164 is 461027934.

439720164 is a `hidden beast` number, since 4 + 397 + 201 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4940632 + ... + 4940720.

It is an arithmetic number, because the mean of its divisors is an integer number (4815720).

Almost surely, 2^439720164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 439720164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693463680).

439720164 is an abundant number, since it is smaller than the sum of its proper divisors (947207196).

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

439720164 is a wasteful number, since it uses less digits than its factorization.

439720164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 439720164 is about 20969.5055735704. The cubic root of 439720164 is about 760.4292150777.

The spelling of 439720164 in words is "four hundred thirty-nine million, seven hundred twenty thousand, one hundred sixty-four".