401031840 has 192 divisors, whose sum is σ = 1389975552. Its totient is φ = 96384000.

The previous prime is 401031833. The next prime is 401031893. The reversal of 401031840 is 48130104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 797029 + ... + 797531.

It is an arithmetic number, because the mean of its divisors is an integer number (7239456).

Almost surely, 2^401031840 is an apocalyptic number.

401031840 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 401031840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694987776).

401031840 is an abundant number, since it is smaller than the sum of its proper divisors (988943712).

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

401031840 is a wasteful number, since it uses less digits than its factorization.

401031840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 401031840 is about 20025.7793855820. The cubic root of 401031840 is about 737.4393109114.

Adding to 401031840 its reverse (48130104), we get a palindrome (449161944).

The spelling of 401031840 in words is "four hundred one million, thirty-one thousand, eight hundred forty".