1604645700 has 144 divisors (see below), whose sum is σ = 5435735424. Its totient is φ = 357811200.

The previous prime is 1604645671. The next prime is 1604645701. The reversal of 1604645700 is 75464061.

It is not an unprimeable number, because it can be changed into a prime (1604645701) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 76782 + ... + 95418.

Almost surely, 2^1604645700 is an apocalyptic number.

1604645700 is a gapful number since it is divisible by the number (10) 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 1604645700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2717867712).

1604645700 is an abundant number, since it is smaller than the sum of its proper divisors (3831089724).

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

1604645700 is a wasteful number, since it uses less digits than its factorization.

1604645700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18702 (or 18695 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1604645700 is about 40058.0291577107. The cubic root of 1604645700 is about 1170.7380105299.

The spelling of 1604645700 in words is "one billion, six hundred four million, six hundred forty-five thousand, seven hundred".