402402232140442 has 32 divisors (see below), whose sum is σ = 614064638042064. Its totient is φ = 197748615168000.

The previous prime is 402402232140371. The next prime is 402402232140449. The reversal of 402402232140442 is 244041232204204.

It can be written as a sum of positive squares in 8 ways, for example, as 89684706980401 + 312717525160041 = 9470201^2 + 17683821^2 .

It is a super-2 number, since 2×402402232140442² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402402232140398 and 402402232140407.

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 15 ways as a sum of consecutive naturals, for example, 2033098 + ... + 28441834.

Almost surely, 2^{402402232140442} is an apocalyptic number.

402402232140442 is a deficient number, since it is larger than the sum of its proper divisors (211662405901622).

402402232140442 is a wasteful number, since it uses less digits than its factorization.

402402232140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26409394.

The product of its (nonzero) digits is 98304, while the sum is 34.

Adding to 402402232140442 its reverse (244041232204204), we get a palindrome (646443464344646).

The spelling of 402402232140442 in words is "four hundred two trillion, four hundred two billion, two hundred thirty-two million, one hundred forty thousand, four hundred forty-two".