402441550140 has 120 divisors (see below), whose sum is σ = 1314564647760. Its totient is φ = 91986607104.

The previous prime is 402441550129. The next prime is 402441550141. The reversal of 402441550140 is 41055144204.

It is a super-2 number, since 2×402441550140² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 402441550098 and 402441550107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402441550141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1252725 + ... + 1540844.

It is an arithmetic number, because the mean of its divisors is an integer number (10954705398).

Almost surely, 2^402441550140 is an apocalyptic number.

It is an amenable number.

402441550140 is an abundant number, since it is smaller than the sum of its proper divisors (912123097620).

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

402441550140 is a wasteful number, since it uses less digits than its factorization.

402441550140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793609 (or 2793586 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 402441550140 its reverse (41055144204), we get a palindrome (443496694344).

The spelling of 402441550140 in words is "four hundred two billion, four hundred forty-one million, five hundred fifty thousand, one hundred forty".