405308340 has 48 divisors (see below), whose sum is σ = 1260960960. Its totient is φ = 108082080.

The previous prime is 405308333. The next prime is 405308341. The reversal of 405308340 is 43803504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405308341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374746 + ... + 375825.

It is an arithmetic number, because the mean of its divisors is an integer number (26270020).

Almost surely, 2^405308340 is an apocalyptic number.

It is an amenable number.

405308340 is an abundant number, since it is smaller than the sum of its proper divisors (855652620).

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

405308340 is a wasteful number, since it uses less digits than its factorization.

405308340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750589 (or 750581 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 405308340 is about 20132.2711088441. The cubic root of 405308340 is about 740.0513356157.

The spelling of 405308340 in words is "four hundred five million, three hundred eight thousand, three hundred forty".