400111002 has 80 divisors (see below), whose sum is σ = 919429632. Its totient is φ = 130014720.

The previous prime is 400110989. The next prime is 400111043. The reversal of 400111002 is 200111004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 39 ways as a sum of consecutive naturals, for example, 2073018 + ... + 2073210.

Almost surely, 2^400111002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400111002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459714816).

400111002 is an abundant number, since it is smaller than the sum of its proper divisors (519318630).

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

400111002 is a wasteful number, since it uses less digits than its factorization.

400111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 400111002 is about 20002.7748575041. The cubic root of 400111002 is about 736.8744492353.

Adding to 400111002 its reverse (200111004), we get a palindrome (600222006).

The spelling of 400111002 in words is "four hundred million, one hundred eleven thousand, two".