1604476644 has 24 divisors (see below), whose sum is σ = 3754577568. Its totient is φ = 533282880.

The previous prime is 1604476639. The next prime is 1604476667. The reversal of 1604476644 is 4466744061.

It is a super-2 number, since 2×1604476644² = 5148690602283005472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1604476596 and 1604476605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188497 + ... + 196824.

It is an arithmetic number, because the mean of its divisors is an integer number (156440732).

Almost surely, 2^1604476644 is an apocalyptic number.

It is an amenable number.

1604476644 is an abundant number, since it is smaller than the sum of its proper divisors (2150100924).

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

1604476644 is a wasteful number, since it uses less digits than its factorization.

1604476644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385675 (or 385673 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The square root of 1604476644 is about 40055.9189633692. The cubic root of 1604476644 is about 1170.6968950703.

The spelling of 1604476644 in words is "one billion, six hundred four million, four hundred seventy-six thousand, six hundred forty-four".