406880820381 has 32 divisors (see below), whose sum is σ = 627187345408. Its totient is φ = 229819757760.

The previous prime is 406880820341. The next prime is 406880820403. The reversal of 406880820381 is 183028088604.

It is not a de Polignac number, because 406880820381 - 2⁷ = 406880820253 is a prime.

It is a super-2 number, since 2×406880820381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406880820381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406880820301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 996330 + ... + 1344036.

It is an arithmetic number, because the mean of its divisors is an integer number (19599604544).

Almost surely, 2^406880820381 is an apocalyptic number.

It is an amenable number.

406880820381 is a deficient number, since it is larger than the sum of its proper divisors (220306525027).

406880820381 is a wasteful number, since it uses less digits than its factorization.

406880820381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348361.

The product of its (nonzero) digits is 589824, while the sum is 48.

The spelling of 406880820381 in words is "four hundred six billion, eight hundred eighty million, eight hundred twenty thousand, three hundred eighty-one".