405826540 has 24 divisors (see below), whose sum is σ = 973984032. Its totient is φ = 139140480.

The previous prime is 405826517. The next prime is 405826607. The reversal of 405826540 is 45628504.

It is a junction number, because it is equal to n+sod(n) for n = 405826496 and 405826505.

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, 1449241 + ... + 1449520.

It is an arithmetic number, because the mean of its divisors is an integer number (40582668).

Almost surely, 2^405826540 is an apocalyptic number.

It is an amenable number.

405826540 is an abundant number, since it is smaller than the sum of its proper divisors (568157492).

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

405826540 is a wasteful number, since it uses less digits than its factorization.

405826540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898777 (or 2898775 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 405826540 is about 20145.1368821361. The cubic root of 405826540 is about 740.3665945954.

The spelling of 405826540 in words is "four hundred five million, eight hundred twenty-six thousand, five hundred forty".