405244420000 has 120 divisors (see below), whose sum is σ = 1139385604896. Its totient is φ = 138940896000.

The previous prime is 405244419989. The next prime is 405244420013. The reversal of 405244420000 is 24442504.

It is a happy number.

It is a super-2 number, since 2×405244420000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1307302 + ... + 1587301.

Almost surely, 2^405244420000 is an apocalyptic number.

405244420000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405244420000 is an abundant number, since it is smaller than the sum of its proper divisors (734141184896).

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

405244420000 is an equidigital number, since it uses as much as digits as its factorization.

405244420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894640 (or 2894617 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 405244420000 its reverse (24442504), we get a palindrome (405268862504).

The spelling of 405244420000 in words is "four hundred five billion, two hundred forty-four million, four hundred twenty thousand".