402442243432 has 8 divisors (see below), whose sum is σ = 754579206450. Its totient is φ = 201221121712.

The previous prime is 402442243337. The next prime is 402442243439. The reversal of 402442243432 is 234342244204.

It can be written as a sum of positive squares in only one way, i.e., 384953238916 + 17489004516 = 620446^2 + 132246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×402442243432² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402442243439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25152640207 + ... + 25152640222.

Almost surely, 2^402442243432 is an apocalyptic number.

It is an amenable number.

402442243432 is a deficient number, since it is larger than the sum of its proper divisors (352136963018).

402442243432 is a wasteful number, since it uses less digits than its factorization.

402442243432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50305280435 (or 50305280431 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 34.

Adding to 402442243432 its reverse (234342244204), we get a palindrome (636784487636).

The spelling of 402442243432 in words is "four hundred two billion, four hundred forty-two million, two hundred forty-three thousand, four hundred thirty-two".