400550112 has 72 divisors (see below), whose sum is σ = 1142721216. Its totient is φ = 133088256.

The previous prime is 400550099. The next prime is 400550119. The reversal of 400550112 is 211055004.

400550112 is a `hidden beast` number, since 4 + 0 + 0 + 550 + 112 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400550119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94993 + ... + 99119.

It is an arithmetic number, because the mean of its divisors is an integer number (15871128).

Almost surely, 2^400550112 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 400550112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571360608).

400550112 is an abundant number, since it is smaller than the sum of its proper divisors (742171104).

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

400550112 is a wasteful number, since it uses less digits than its factorization.

400550112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480 (or 4469 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 400550112 is about 20013.7480747610. The cubic root of 400550112 is about 737.1439166587.

The spelling of 400550112 in words is "four hundred million, five hundred fifty thousand, one hundred twelve".