402111144 has 24 divisors (see below), whose sum is σ = 1089051210. Its totient is φ = 134037024.

The previous prime is 402111131. The next prime is 402111163. The reversal of 402111144 is 441111204.

It can be written as a sum of positive squares in only one way, i.e., 374422500 + 27688644 = 19350^2 + 5262^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2792367 + ... + 2792510.

Almost surely, 2^402111144 is an apocalyptic number.

It is an amenable number.

402111144 is an abundant number, since it is smaller than the sum of its proper divisors (686940066).

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

402111144 is a wasteful number, since it uses less digits than its factorization.

402111144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584889 (or 5584882 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 402111144 is about 20052.7091436544. The cubic root of 402111144 is about 738.1002794089.

Adding to 402111144 its reverse (441111204), we get a palindrome (843222348).

The spelling of 402111144 in words is "four hundred two million, one hundred eleven thousand, one hundred forty-four".