401240040 has 64 divisors (see below), whose sum is σ = 1208165760. Its totient is φ = 106602240.

The previous prime is 401240029. The next prime is 401240053. The reversal of 401240040 is 40042104.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 15 ways as a sum of consecutive naturals, for example, 27205 + ... + 39275.

It is an arithmetic number, because the mean of its divisors is an integer number (18877590).

Almost surely, 2^401240040 is an apocalyptic number.

401240040 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 401240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604082880).

401240040 is an abundant number, since it is smaller than the sum of its proper divisors (806925720).

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

401240040 is a wasteful number, since it uses less digits than its factorization.

401240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12362 (or 12358 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 401240040 is about 20030.9770106203. The cubic root of 401240040 is about 737.5669053541.

Adding to 401240040 its reverse (40042104), we get a palindrome (441282144).

The spelling of 401240040 in words is "four hundred one million, two hundred forty thousand, forty".