405622972 has 48 divisors (see below), whose sum is σ = 758661120. Its totient is φ = 189446400.

The previous prime is 405622949. The next prime is 405622979. The reversal of 405622972 is 279226504.

It is a happy number.

It is a super-2 number, since 2×405622972² = 329059990828225568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405622979) 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 15 ways as a sum of consecutive naturals, for example, 459972 + ... + 460852.

It is an arithmetic number, because the mean of its divisors is an integer number (15805440).

Almost surely, 2^405622972 is an apocalyptic number.

It is an amenable number.

405622972 is a deficient number, since it is larger than the sum of its proper divisors (353038148).

405622972 is a wasteful number, since it uses less digits than its factorization.

405622972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 405622972 is about 20140.0837138280. The cubic root of 405622972 is about 740.2427813080.

It can be divided in two parts, 40562 and 2972, that added together give a palindrome (43534).

The spelling of 405622972 in words is "four hundred five million, six hundred twenty-two thousand, nine hundred seventy-two".