400678044 has 36 divisors (see below), whose sum is σ = 1012369176. Its totient is φ = 123284928.

The previous prime is 400678013. The next prime is 400678051. The reversal of 400678044 is 440876004.

It is a junction number, because it is equal to n+sod(n) for n = 400677996 and 400678014.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 96759 + ... + 100814.

It is an arithmetic number, because the mean of its divisors is an integer number (28121366).

Almost surely, 2^400678044 is an apocalyptic number.

It is an amenable number.

400678044 is an abundant number, since it is smaller than the sum of its proper divisors (611691132).

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

400678044 is a wasteful number, since it uses less digits than its factorization.

400678044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197606 (or 197591 counting only the distinct ones).

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

The square root of 400678044 is about 20016.9439225872. The cubic root of 400678044 is about 737.2223872874. Note that the first 3 decimals are identical.

The spelling of 400678044 in words is "four hundred million, six hundred seventy-eight thousand, forty-four".