1805532540 has 48 divisors (see below), whose sum is σ = 5777705472. Its totient is φ = 412693056.

The previous prime is 1805532529. The next prime is 1805532559. The reversal of 1805532540 is 452355081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149024 + ... + 2149863.

It is an arithmetic number, because the mean of its divisors is an integer number (120368864).

Almost surely, 2^1805532540 is an apocalyptic number.

1805532540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1805532540 is an abundant number, since it is smaller than the sum of its proper divisors (3972172932).

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

1805532540 is a wasteful number, since it uses less digits than its factorization.

1805532540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298906 (or 4298904 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1805532540 is about 42491.5584557686. The cubic root of 1805532540 is about 1217.6854216566.

The spelling of 1805532540 in words is "one billion, eight hundred five million, five hundred thirty-two thousand, five hundred forty".