164939220 has 192 divisors, whose sum is σ = 541900800. Its totient is φ = 41592960.

The previous prime is 164939213. The next prime is 164939231. The reversal of 164939220 is 22939461.

164939220 is a `hidden beast` number, since 1 + 649 + 3 + 9 + 2 + 2 + 0 = 666.

164939220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63 ways as a sum of consecutive naturals, for example, 987577 + ... + 987743.

It is an arithmetic number, because the mean of its divisors is an integer number (2822400).

Almost surely, 2^164939220 is an apocalyptic number.

164939220 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 164939220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270950400).

164939220 is an abundant number, since it is smaller than the sum of its proper divisors (376961580).

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

164939220 is a wasteful number, since it uses less digits than its factorization.

164939220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 164939220 is about 12842.8665024596. The cubic root of 164939220 is about 548.4133001960.

The spelling of 164939220 in words is "one hundred sixty-four million, nine hundred thirty-nine thousand, two hundred twenty".