1604540880 has 160 divisors (see below), whose sum is σ = 5817782400. Its totient is φ = 405347328.

The previous prime is 1604540879. The next prime is 1604540887. The reversal of 1604540880 is 880454061.

1604540880 is a `hidden beast` number, since 1 + 604 + 5 + 40 + 8 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604540887) 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 31 ways as a sum of consecutive naturals, for example, 21492 + ... + 60588.

It is an arithmetic number, because the mean of its divisors is an integer number (36361140).

Almost surely, 2^1604540880 is an apocalyptic number.

1604540880 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 1604540880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2908891200).

1604540880 is an abundant number, since it is smaller than the sum of its proper divisors (4213241520).

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

1604540880 is a wasteful number, since it uses less digits than its factorization.

1604540880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39138 (or 39126 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1604540880 is about 40056.7207844077. The cubic root of 1604540880 is about 1170.7125180010.

The spelling of 1604540880 in words is "one billion, six hundred four million, five hundred forty thousand, eight hundred eighty".