1667022444 has 120 divisors (see below), whose sum is σ = 4533265968. Its totient is φ = 533744640.

The previous prime is 1667022407. The next prime is 1667022449. The reversal of 1667022444 is 4442207661.

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

It is a junction number, because it is equal to n+sod(n) for n = 1667022399 and 1667022408.

It is not an unprimeable number, because it can be changed into a prime (1667022449) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 889092 + ... + 890964.

Almost surely, 2^1667022444 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 1667022444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2266632984).

1667022444 is an abundant number, since it is smaller than the sum of its proper divisors (2866243524).

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

1667022444 is a wasteful number, since it uses less digits than its factorization.

1667022444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1986 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 1667022444 is about 40829.1861785170. The cubic root of 1667022444 is about 1185.7154596288.

The spelling of 1667022444 in words is "one billion, six hundred sixty-seven million, twenty-two thousand, four hundred forty-four".