402440242240 has 56 divisors (see below), whose sum is σ = 958473759960. Its totient is φ = 160948727808.

The previous prime is 402440242231. The next prime is 402440242247. The reversal of 402440242240 is 42242044204.

It can be written as a sum of positive squares in 4 ways, for example, as 108826624 + 402331415616 = 10432^2 + 634296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402440242199 and 402440242208.

It is not an unprimeable number, because it can be changed into a prime (402440242247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833076 + ... + 2040844.

Almost surely, 2^402440242240 is an apocalyptic number.

402440242240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402440242240 is an abundant number, since it is smaller than the sum of its proper divisors (556033517720).

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

402440242240 is a wasteful number, since it uses less digits than its factorization.

402440242240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213839 (or 213829 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 402440242240 its reverse (42242044204), we get a palindrome (444682286444).

It can be divided in two parts, 402440 and 242240, that added together give a triangular number (644680 = T₁₁₃₅).

The spelling of 402440242240 in words is "four hundred two billion, four hundred forty million, two hundred forty-two thousand, two hundred forty".