1604144532 has 24 divisors (see below), whose sum is σ = 3759499296. Its totient is φ = 532358368.

The previous prime is 1604144513. The next prime is 1604144539. The reversal of 1604144532 is 2354414061.

It is a self number, because there is not a number n which added to its sum of digits gives 1604144532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604144539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291723 + ... + 297170.

It is an arithmetic number, because the mean of its divisors is an integer number (156645804).

Almost surely, 2^1604144532 is an apocalyptic number.

1604144532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1604144532 is an abundant number, since it is smaller than the sum of its proper divisors (2155354764).

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

1604144532 is a wasteful number, since it uses less digits than its factorization.

1604144532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589127 (or 589125 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1604144532 is about 40051.7731442692. The cubic root of 1604144532 is about 1170.6161149776.

Adding to 1604144532 its reverse (2354414061), we get a palindrome (3958558593).

The spelling of 1604144532 in words is "one billion, six hundred four million, one hundred forty-four thousand, five hundred thirty-two".