405538382 has 4 divisors (see below), whose sum is σ = 608307576. Its totient is φ = 202769190.

The previous prime is 405538381. The next prime is 405538387. The reversal of 405538382 is 283835504.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×405538382² = 328922758550355848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405538381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101384594 + ... + 101384597.

It is an arithmetic number, because the mean of its divisors is an integer number (152076894).

Almost surely, 2^405538382 is an apocalyptic number.

405538382 is a deficient number, since it is larger than the sum of its proper divisors (202769194).

405538382 is a wasteful number, since it uses less digits than its factorization.

405538382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202769193.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 405538382 is about 20137.9835634057. The cubic root of 405538382 is about 740.1913201445.

The spelling of 405538382 in words is "four hundred five million, five hundred thirty-eight thousand, three hundred eighty-two".