405906421492 has 288 divisors, whose sum is σ = 923579596800. Its totient is φ = 153298656000.

The previous prime is 405906421411. The next prime is 405906421493. The reversal of 405906421492 is 294124609504.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405906421493) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1698353109 + ... + 1698353347.

It is an arithmetic number, because the mean of its divisors is an integer number (3206873600).

Almost surely, 2^405906421492 is an apocalyptic number.

It is an amenable number.

405906421492 is an abundant number, since it is smaller than the sum of its proper divisors (517673175308).

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

405906421492 is a wasteful number, since it uses less digits than its factorization.

405906421492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 405906421492 in words is "four hundred five billion, nine hundred six million, four hundred twenty-one thousand, four hundred ninety-two".