405800540 has 48 divisors (see below), whose sum is σ = 931440384. Its totient is φ = 147840000.

The previous prime is 405800519. The next prime is 405800543. The reversal of 405800540 is 45008504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405800543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8711 + ... + 29790.

It is an arithmetic number, because the mean of its divisors is an integer number (19405008).

Almost surely, 2^405800540 is an apocalyptic number.

It is an amenable number.

405800540 is an abundant number, since it is smaller than the sum of its proper divisors (525639844).

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

405800540 is a wasteful number, since it uses less digits than its factorization.

405800540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38558 (or 38556 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 405800540 is about 20144.4915547650. The cubic root of 405800540 is about 740.3507832897.

The spelling of 405800540 in words is "four hundred five million, eight hundred thousand, five hundred forty".