405770340 has 24 divisors (see below), whose sum is σ = 1136157120. Its totient is φ = 108205408.

The previous prime is 405770311. The next prime is 405770357. The reversal of 405770340 is 43077504.

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 = 405770298 and 405770307.

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, 3381360 + ... + 3381479.

It is an arithmetic number, because the mean of its divisors is an integer number (47339880).

Almost surely, 2^405770340 is an apocalyptic number.

It is an amenable number.

405770340 is an abundant number, since it is smaller than the sum of its proper divisors (730386780).

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

405770340 is a wasteful number, since it uses less digits than its factorization.

405770340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762851 (or 6762849 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 405770340 is about 20143.7419562503. The cubic root of 405770340 is about 740.3324170020.

The spelling of 405770340 in words is "four hundred five million, seven hundred seventy thousand, three hundred forty".