1604922012 has 90 divisors (see below), whose sum is σ = 4270899248. Its totient is φ = 525537072.

The previous prime is 1604921993. The next prime is 1604922023. The reversal of 1604922012 is 2102294061.

1604922012 is a `hidden beast` number, since 160 + 492 + 2 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1127133 + ... + 1128555.

Almost surely, 2^1604922012 is an apocalyptic number.

1604922012 is a gapful number since it is divisible by the number (12) 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 1604922012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2135449624).

1604922012 is an abundant number, since it is smaller than the sum of its proper divisors (2665977236).

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

1604922012 is a wasteful number, since it uses less digits than its factorization.

1604922012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1604922012 is about 40061.4779058387. The cubic root of 1604922012 is about 1170.8052050919.

The spelling of 1604922012 in words is "one billion, six hundred four million, nine hundred twenty-two thousand, twelve".