1604936540 has 24 divisors (see below), whose sum is σ = 3417839712. Its totient is φ = 632932160.

The previous prime is 1604936533. The next prime is 1604936579. The reversal of 1604936540 is 456394061.

It is a junction number, because it is equal to n+sod(n) for n = 1604936494 and 1604936503.

It is a congruent number.

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, 563699 + ... + 566538.

It is an arithmetic number, because the mean of its divisors is an integer number (142409988).

Almost surely, 2^1604936540 is an apocalyptic number.

1604936540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604936540 is an abundant number, since it is smaller than the sum of its proper divisors (1812903172).

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

1604936540 is a wasteful number, since it uses less digits than its factorization.

1604936540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130317 (or 1130315 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1604936540 is about 40061.6592267470. The cubic root of 1604936540 is about 1170.8087378507.

The spelling of 1604936540 in words is "one billion, six hundred four million, nine hundred thirty-six thousand, five hundred forty".