405984126 has 8 divisors (see below), whose sum is σ = 811968264. Its totient is φ = 135328040.

The previous prime is 405984121. The next prime is 405984143. The reversal of 405984126 is 621489504.

It is a sphenic number, since it is the product of 3 distinct primes.

405984126 is an admirable number.

It is a super-2 number, since 2×405984126² = 329646221127967752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405984121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33832005 + ... + 33832016.

It is an arithmetic number, because the mean of its divisors is an integer number (101496033).

Almost surely, 2^405984126 is an apocalyptic number.

405984126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

405984126 is a wasteful number, since it uses less digits than its factorization.

405984126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67664026.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 405984126 is about 20149.0477690634. The cubic root of 405984126 is about 740.4624124720.

The spelling of 405984126 in words is "four hundred five million, nine hundred eighty-four thousand, one hundred twenty-six".