1604041890 has 64 divisors (see below), whose sum is σ = 4204016640. Its totient is φ = 388456640.

The previous prime is 1604041861. The next prime is 1604041891. The reversal of 1604041890 is 981404061.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1604041891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429451 + ... + 433169.

It is an arithmetic number, because the mean of its divisors is an integer number (65687760).

Almost surely, 2^1604041890 is an apocalyptic number.

1604041890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1604041890 is an abundant number, since it is smaller than the sum of its proper divisors (2599974750).

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

1604041890 is a wasteful number, since it uses less digits than its factorization.

1604041890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1604041890 is about 40050.4917572806. The cubic root of 1604041890 is about 1170.5911469568.

The spelling of 1604041890 in words is "one billion, six hundred four million, forty-one thousand, eight hundred ninety".