406857220088 has 64 divisors (see below), whose sum is σ = 851734224000. Its totient is φ = 180597674880.

The previous prime is 406857220079. The next prime is 406857220109. The reversal of 406857220088 is 880022758604.

It is a happy number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28558295 + ... + 28572537.

It is an arithmetic number, because the mean of its divisors is an integer number (13308347250).

Almost surely, 2^406857220088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406857220088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425867112000).

406857220088 is an abundant number, since it is smaller than the sum of its proper divisors (444877003912).

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

406857220088 is a wasteful number, since it uses less digits than its factorization.

406857220088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21852 (or 21848 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 50.

The spelling of 406857220088 in words is "four hundred six billion, eight hundred fifty-seven million, two hundred twenty thousand, eighty-eight".