402402232140444 has 96 divisors (see below), whose sum is σ = 1048411744531200. Its totient is φ = 133472604444480.

The previous prime is 402402232140371. The next prime is 402402232140449. The reversal of 402402232140444 is 444041232204204.

402402232140444 is a `hidden beast` number, since 4 + 0 + 2 + 4 + 0 + 223 + 21 + 404 + 4 + 4 = 666.

It is a super-2 number, since 2×402402232140444² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 402402232140399 and 402402232140408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402402232140449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116545399 + ... + 119948465.

It is an arithmetic number, because the mean of its divisors is an integer number (10920955672200).

Almost surely, 2^{402402232140444} 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 402402232140444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524205872265600).

402402232140444 is an abundant number, since it is smaller than the sum of its proper divisors (646009512390756).

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

402402232140444 is a wasteful number, since it uses less digits than its factorization.

402402232140444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408480 (or 3408472 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 36.

Adding to 402402232140444 its reverse (444041232204204), we get a palindrome (846443464344648).

The spelling of 402402232140444 in words is "four hundred two trillion, four hundred two billion, two hundred thirty-two million, one hundred forty thousand, four hundred forty-four".