402144223231040 has 28 divisors (see below), whose sum is σ = 957605931569676. Its totient is φ = 160857689292288.

The previous prime is 402144223230977. The next prime is 402144223231061. The reversal of 402144223231040 is 40132322441204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 222491590487104 + 179652632743936 = 14916152^2 + 13403456^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 402144223230988 and 402144223231006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628350348479 + ... + 628350349118.

Almost surely, 2^{402144223231040} is an apocalyptic number.

402144223231040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402144223231040 is an abundant number, since it is smaller than the sum of its proper divisors (555461708338636).

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

402144223231040 is a wasteful number, since it uses less digits than its factorization.

402144223231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256700697614 (or 1256700697604 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 402144223231040 its reverse (40132322441204), we get a palindrome (442276545672244).

The spelling of 402144223231040 in words is "four hundred two trillion, one hundred forty-four billion, two hundred twenty-three million, two hundred thirty-one thousand, forty".