402221311040 has 56 divisors (see below), whose sum is σ = 1014130069272. Its totient is φ = 151424491520.

The previous prime is 402221311033. The next prime is 402221311069. The reversal of 402221311040 is 40113122204.

It can be written as a sum of positive squares in 4 ways, for example, as 29945610304 + 372275700736 = 173048^2 + 610144^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36963431 + ... + 36974310.

Almost surely, 2^402221311040 is an apocalyptic number.

402221311040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402221311040 is an abundant number, since it is smaller than the sum of its proper divisors (611908758232).

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

402221311040 is a wasteful number, since it uses less digits than its factorization.

402221311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73937775 (or 73937765 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 402221311040 its reverse (40113122204), we get a palindrome (442334433244).

The spelling of 402221311040 in words is "four hundred two billion, two hundred twenty-one million, three hundred eleven thousand, forty".