1606394972 has 24 divisors (see below), whose sum is σ = 3459928416. Its totient is φ = 635496768.

The previous prime is 1606394963. The next prime is 1606394987. The reversal of 1606394972 is 2794936061.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2206223 + ... + 2206950.

It is an arithmetic number, because the mean of its divisors is an integer number (144163684).

Almost surely, 2^1606394972 is an apocalyptic number.

It is an amenable number.

1606394972 is an abundant number, since it is smaller than the sum of its proper divisors (1853533444).

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

1606394972 is a wasteful number, since it uses less digits than its factorization.

1606394972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413197 (or 4413195 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 1606394972 is about 40079.8574348762. The cubic root of 1606394972 is about 1171.1632748106.

The spelling of 1606394972 in words is "one billion, six hundred six million, three hundred ninety-four thousand, nine hundred seventy-two".