401217190440 has 128 divisors (see below), whose sum is σ = 1314519736320. Its totient is φ = 97157715200.

The previous prime is 401217190421. The next prime is 401217190489. The reversal of 401217190440 is 44091712104.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1035697 + ... + 1369343.

It is an arithmetic number, because the mean of its divisors is an integer number (10269685440).

Almost surely, 2^401217190440 is an apocalyptic number.

401217190440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401217190440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657259868160).

401217190440 is an abundant number, since it is smaller than the sum of its proper divisors (913302545880).

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

401217190440 is a wasteful number, since it uses less digits than its factorization.

401217190440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334583 (or 334579 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 401217190440 in words is "four hundred one billion, two hundred seventeen million, one hundred ninety thousand, four hundred forty".