1604136020 has 24 divisors (see below), whose sum is σ = 3409275744. Its totient is φ = 633922976.

The previous prime is 1604136019. The next prime is 1604136059. The reversal of 1604136020 is 206314061.

It is a happy number.

It is a super-2 number, since 2×1604136020² = 5146504741322880800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 481514 + ... + 484833.

It is an arithmetic number, because the mean of its divisors is an integer number (142053156).

Almost surely, 2^1604136020 is an apocalyptic number.

1604136020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604136020 is an abundant number, since it is smaller than the sum of its proper divisors (1805139724).

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

1604136020 is a wasteful number, since it uses less digits than its factorization.

1604136020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966439 (or 966437 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1604136020 is about 40051.6668816667. Note that the first 3 decimals coincide. The cubic root of 1604136020 is about 1170.6140444447.

The spelling of 1604136020 in words is "one billion, six hundred four million, one hundred thirty-six thousand, twenty".