405120822 has 16 divisors (see below), whose sum is σ = 810785280. Its totient is φ = 134949672.

The previous prime is 405120809. The next prime is 405120823. The reversal of 405120822 is 228021504.

It is a junction number, because it is equal to n+sod(n) for n = 405120792 and 405120801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405120823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12622 + ... + 31137.

It is an arithmetic number, because the mean of its divisors is an integer number (50674080).

Almost surely, 2^405120822 is an apocalyptic number.

405120822 is an abundant number, since it is smaller than the sum of its proper divisors (405664458).

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

405120822 is a wasteful number, since it uses less digits than its factorization.

405120822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45307.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 405120822 is about 20127.6134203735. The cubic root of 405120822 is about 739.9371884841.

The spelling of 405120822 in words is "four hundred five million, one hundred twenty thousand, eight hundred twenty-two".