401400340 has 48 divisors (see below), whose sum is σ = 924799680. Its totient is φ = 145134080.

The previous prime is 401400211. The next prime is 401400401. The reversal of 401400340 is 43004104.

It is a super-2 number, since 2×401400340² = 322244465904231200, which contains 22 as substring.

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, 34284 + ... + 44476.

It is an arithmetic number, because the mean of its divisors is an integer number (19266660).

Almost surely, 2^401400340 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 401400340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462399840).

401400340 is an abundant number, since it is smaller than the sum of its proper divisors (523399340).

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

401400340 is a wasteful number, since it uses less digits than its factorization.

401400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392 (or 10390 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 401400340 is about 20034.9779136389. The cubic root of 401400340 is about 737.6651144240.

Adding to 401400340 its reverse (43004104), we get a palindrome (444404444).

The spelling of 401400340 in words is "four hundred one million, four hundred thousand, three hundred forty".