406878449020 has 24 divisors (see below), whose sum is σ = 856391104800. Its totient is φ = 162380644032.

The previous prime is 406878448913. The next prime is 406878449023. The reversal of 406878449020 is 20944878604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406878449023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23161975 + ... + 23179534.

It is an arithmetic number, because the mean of its divisors is an integer number (35682962700).

Almost surely, 2^406878449020 is an apocalyptic number.

It is an amenable number.

406878449020 is an abundant number, since it is smaller than the sum of its proper divisors (449512655780).

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

406878449020 is a wasteful number, since it uses less digits than its factorization.

406878449020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46341957 (or 46341955 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 406878449020 in words is "four hundred six billion, eight hundred seventy-eight million, four hundred forty-nine thousand, twenty".