402243220040 has 64 divisors (see below), whose sum is σ = 915783669360. Its totient is φ = 158993694720.

The previous prime is 402243220037. The next prime is 402243220073. The reversal of 402243220040 is 40022342204.

It can be written as a sum of positive squares in 8 ways, for example, as 31052783524 + 371190436516 = 176218^2 + 609254^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402243219988 and 402243220015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2454260 + ... + 2613020.

Almost surely, 2^402243220040 is an apocalyptic number.

402243220040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402243220040 is an abundant number, since it is smaller than the sum of its proper divisors (513540449320).

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

402243220040 is a wasteful number, since it uses less digits than its factorization.

402243220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159522 (or 159518 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 402243220040 its reverse (40022342204), we get a palindrome (442265562244).

The spelling of 402243220040 in words is "four hundred two billion, two hundred forty-three million, two hundred twenty thousand, forty".