403120343440 has 40 divisors (see below), whose sum is σ = 937502605368. Its totient is φ = 161205504000.

The previous prime is 403120343411. The next prime is 403120343441. The reversal of 403120343440 is 44343021304.

It can be written as a sum of positive squares in 4 ways, for example, as 2765497744 + 400354845696 = 52588^2 + 632736^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×403120343440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 403120343399 and 403120343408.

It is not an unprimeable number, because it can be changed into a prime (403120343441) 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, 360811 + ... + 967690.

Almost surely, 2^403120343440 is an apocalyptic number.

403120343440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403120343440 is an abundant number, since it is smaller than the sum of its proper divisors (534382261928).

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

403120343440 is a wasteful number, since it uses less digits than its factorization.

403120343440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332307 (or 1332301 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 403120343440 its reverse (44343021304), we get a palindrome (447463364744).

The spelling of 403120343440 in words is "four hundred three billion, one hundred twenty million, three hundred forty-three thousand, four hundred forty".