405534540 has 24 divisors (see below), whose sum is σ = 1135496880. Its totient is φ = 108142528.

The previous prime is 405534539. The next prime is 405534557. The reversal of 405534540 is 45435504.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 405534498 and 405534507.

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, 3379395 + ... + 3379514.

It is an arithmetic number, because the mean of its divisors is an integer number (47312370).

Almost surely, 2^405534540 is an apocalyptic number.

It is an amenable number.

405534540 is an abundant number, since it is smaller than the sum of its proper divisors (729962340).

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

405534540 is a wasteful number, since it uses less digits than its factorization.

405534540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758921 (or 6758919 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 405534540 is about 20137.8881713054. Note that the first 3 decimals coincide. The cubic root of 405534540 is about 740.1889826559.

The spelling of 405534540 in words is "four hundred five million, five hundred thirty-four thousand, five hundred forty".