401831712 has 192 divisors, whose sum is σ = 1244194560. Its totient is φ = 125908992.

The previous prime is 401831711. The next prime is 401831719. The reversal of 401831712 is 217138104.

It is a super-2 number, since 2×401831712² = 322937449537701888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (401831711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1450518 + ... + 1450794.

It is an arithmetic number, because the mean of its divisors is an integer number (6480180).

Almost surely, 2^401831712 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 401831712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622097280).

401831712 is an abundant number, since it is smaller than the sum of its proper divisors (842362848).

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

401831712 is a wasteful number, since it uses less digits than its factorization.

401831712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 401831712 is about 20045.7404951775. The cubic root of 401831712 is about 737.9292681236.

Adding to 401831712 its reverse (217138104), we get a palindrome (618969816).

The spelling of 401831712 in words is "four hundred one million, eight hundred thirty-one thousand, seven hundred twelve".