405772422090 has 128 divisors (see below), whose sum is σ = 1134750961152. Its totient is φ = 90948096000.

The previous prime is 405772422071. The next prime is 405772422109. The reversal of 405772422090 is 90224277504.

It is an interprime number because it is at equal distance from previous prime (405772422071) and next prime (405772422109).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2575590 + ... + 2728590.

It is an arithmetic number, because the mean of its divisors is an integer number (8865241884).

Almost surely, 2^405772422090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405772422090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (567375480576).

405772422090 is an abundant number, since it is smaller than the sum of its proper divisors (728978539062).

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

405772422090 is a wasteful number, since it uses less digits than its factorization.

405772422090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153264.

The product of its (nonzero) digits is 282240, while the sum is 42.

Adding to 405772422090 its reverse (90224277504), we get a palindrome (495996699594).

The spelling of 405772422090 in words is "four hundred five billion, seven hundred seventy-two million, four hundred twenty-two thousand, ninety".