400217689446 has 32 divisors (see below), whose sum is σ = 817594259328. Its totient is φ = 130573984320.

The previous prime is 400217689441. The next prime is 400217689447. The reversal of 400217689446 is 644986712004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400217689441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3430176 + ... + 3544931.

It is an arithmetic number, because the mean of its divisors is an integer number (25549820604).

Almost surely, 2^400217689446 is an apocalyptic number.

400217689446 is an abundant number, since it is smaller than the sum of its proper divisors (417376569882).

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

400217689446 is a wasteful number, since it uses less digits than its factorization.

400217689446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6975316.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 400217689446 in words is "four hundred billion, two hundred seventeen million, six hundred eighty-nine thousand, four hundred forty-six".