405646239240 has 96 divisors (see below), whose sum is σ = 1438200316800. Its totient is φ = 98338481280.

The previous prime is 405646239077. The next prime is 405646239247. The reversal of 405646239240 is 42932646504.

405646239240 is a `hidden beast` number, since 4 + 0 + 564 + 62 + 3 + 9 + 24 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (405646239247) 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, 51214000 + ... + 51221919.

It is an arithmetic number, because the mean of its divisors is an integer number (14981253300).

Almost surely, 2^405646239240 is an apocalyptic number.

405646239240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405646239240 is an abundant number, since it is smaller than the sum of its proper divisors (1032554077560).

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

405646239240 is a wasteful number, since it uses less digits than its factorization.

405646239240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102435947 (or 102435940 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 405646239240 in words is "four hundred five billion, six hundred forty-six million, two hundred thirty-nine thousand, two hundred forty".