1604553252 has 24 divisors (see below), whose sum is σ = 3799839456. Its totient is φ = 526867968.

The previous prime is 1604553241. The next prime is 1604553253. The reversal of 1604553252 is 2523554061.

It is a super-2 number, since 2×1604553252² = 5149182277007551008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1604553253) 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, 997053 + ... + 998660.

It is an arithmetic number, because the mean of its divisors is an integer number (158326644).

Almost surely, 2^1604553252 is an apocalyptic number.

1604553252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1604553252 is an abundant number, since it is smaller than the sum of its proper divisors (2195286204).

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

1604553252 is a wasteful number, since it uses less digits than its factorization.

1604553252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995787 (or 1995785 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 1604553252 is about 40056.8752151238. The cubic root of 1604553252 is about 1170.7155269652.

The spelling of 1604553252 in words is "one billion, six hundred four million, five hundred fifty-three thousand, two hundred fifty-two".