403235142640 has 240 divisors, whose sum is σ = 1056218397696. Its totient is φ = 142994142720.

The previous prime is 403235142623. The next prime is 403235142679. The reversal of 403235142640 is 46241532304.

It is a super-2 number, since 2×403235142640² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 403235142596 and 403235142605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139671277 + ... + 139674163.

Almost surely, 2^403235142640 is an apocalyptic number.

403235142640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403235142640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528109198848).

403235142640 is an abundant number, since it is smaller than the sum of its proper divisors (652983255056).

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

403235142640 is a wasteful number, since it uses less digits than its factorization.

403235142640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276 (or 3259 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 403235142640 its reverse (46241532304), we get a palindrome (449476674944).

The spelling of 403235142640 in words is "four hundred three billion, two hundred thirty-five million, one hundred forty-two thousand, six hundred forty".