400067844 has 24 divisors (see below), whose sum is σ = 1018354848. Its totient is φ = 121232640.

The previous prime is 400067839. The next prime is 400067861. The reversal of 400067844 is 448760004.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515277 + ... + 1515540.

It is an arithmetic number, because the mean of its divisors is an integer number (42431452).

Almost surely, 2^400067844 is an apocalyptic number.

400067844 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400067844 is an abundant number, since it is smaller than the sum of its proper divisors (618287004).

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

400067844 is a wasteful number, since it uses less digits than its factorization.

400067844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030835 (or 3030833 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 400067844 is about 20001.6960280872. The cubic root of 400067844 is about 736.8479539453.

The spelling of 400067844 in words is "four hundred million, sixty-seven thousand, eight hundred forty-four".