400105552 has 120 divisors (see below), whose sum is σ = 1001310912. Its totient is φ = 150374400.

The previous prime is 400105513. The next prime is 400105579. The reversal of 400105552 is 255501004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4495524 + ... + 4495612.

Almost surely, 2^400105552 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 400105552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500655456).

400105552 is an abundant number, since it is smaller than the sum of its proper divisors (601205360).

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

400105552 is a wasteful number, since it uses less digits than its factorization.

400105552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 400105552 is about 20002.6386259413. The cubic root of 400105552 is about 736.8711035104.

Adding to 400105552 its reverse (255501004), we get a palindrome (655606556).

The spelling of 400105552 in words is "four hundred million, one hundred five thousand, five hundred fifty-two".