401844040 has 64 divisors (see below), whose sum is σ = 1016064000. Its totient is φ = 141917952.

The previous prime is 401844029. The next prime is 401844043. The reversal of 401844040 is 40448104.

It is a happy number.

It is a super-2 number, since 2×401844040² = 322957264967043200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401843996 and 401844014.

It is not an unprimeable number, because it can be changed into a prime (401844043) 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 15 ways as a sum of consecutive naturals, for example, 4840 + ... + 28759.

It is an arithmetic number, because the mean of its divisors is an integer number (15876000).

Almost surely, 2^401844040 is an apocalyptic number.

401844040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401844040 is an abundant number, since it is smaller than the sum of its proper divisors (614219960).

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

401844040 is a wasteful number, since it uses less digits than its factorization.

401844040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33646 (or 33642 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 401844040 is about 20046.0479895664. The cubic root of 401844040 is about 737.9368144825.

The spelling of 401844040 in words is "four hundred one million, eight hundred forty-four thousand, forty".