403665213240 has 96 divisors (see below), whose sum is σ = 1312022415600. Its totient is φ = 107634992640.

The previous prime is 403665213233. The next prime is 403665213247. The reversal of 403665213240 is 42312566304.

403665213240 is a `hidden beast` number, since 4 + 0 + 3 + 66 + 521 + 32 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (403665213233) and next prime (403665213247).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 403665213195 and 403665213204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403665213247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4974916 + ... + 5055404.

Almost surely, 2^403665213240 is an apocalyptic number.

403665213240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403665213240 is an abundant number, since it is smaller than the sum of its proper divisors (908357202360).

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

403665213240 is a wasteful number, since it uses less digits than its factorization.

403665213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94437 (or 94430 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 403665213240 its reverse (42312566304), we get a palindrome (445977779544).

The spelling of 403665213240 in words is "four hundred three billion, six hundred sixty-five million, two hundred thirteen thousand, two hundred forty".