405221802 has 16 divisors (see below), whose sum is σ = 810705792. Its totient is φ = 135030240.

The previous prime is 405221783. The next prime is 405221807. The reversal of 405221802 is 208122504.

It is a super-2 number, since 2×405221802² = 328409417632254408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405221807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13302 + ... + 31422.

It is an arithmetic number, because the mean of its divisors is an integer number (50669112).

Almost surely, 2^405221802 is an apocalyptic number.

405221802 is an abundant number, since it is smaller than the sum of its proper divisors (405483990).

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

405221802 is a wasteful number, since it uses less digits than its factorization.

405221802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21853.

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

The square root of 405221802 is about 20130.1217582011. The cubic root of 405221802 is about 739.9986620380.

It can be divided in two parts, 40522 and 1802, that added together give a palindrome (42324).

The spelling of 405221802 in words is "four hundred five million, two hundred twenty-one thousand, eight hundred two".