402066640240 has 20 divisors (see below), whose sum is σ = 934804938744. Its totient is φ = 160826656064.

The previous prime is 402066640207. The next prime is 402066640243. The reversal of 402066640240 is 42046660204.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 402066640196 and 402066640205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402066640243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2512916422 + ... + 2512916581.

Almost surely, 2^402066640240 is an apocalyptic number.

402066640240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402066640240 is an abundant number, since it is smaller than the sum of its proper divisors (532738298504).

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

402066640240 is a wasteful number, since it uses less digits than its factorization.

402066640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025833016 (or 5025833010 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 402066640240 in words is "four hundred two billion, sixty-six million, six hundred forty thousand, two hundred forty".