1604433020 has 24 divisors (see below), whose sum is σ = 3426418800. Its totient is φ = 630895232.

The previous prime is 1604433001. The next prime is 1604433023. The reversal of 1604433020 is 203344061.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604433023) 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, 678665 + ... + 681024.

It is an arithmetic number, because the mean of its divisors is an integer number (142767450).

Almost surely, 2^1604433020 is an apocalyptic number.

1604433020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604433020 is an abundant number, since it is smaller than the sum of its proper divisors (1821985780).

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

1604433020 is a wasteful number, since it uses less digits than its factorization.

1604433020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359757 (or 1359755 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1604433020 is about 40055.3744209188. The cubic root of 1604433020 is about 1170.6862849763.

Adding to 1604433020 its reverse (203344061), we get a palindrome (1807777081).

The spelling of 1604433020 in words is "one billion, six hundred four million, four hundred thirty-three thousand, twenty".