404242020240 has 80 divisors (see below), whose sum is σ = 1265557766976. Its totient is φ = 106730560000.

The previous prime is 404242020197. The next prime is 404242020271. The reversal of 404242020240 is 42020242404.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×404242020240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 404242020240.

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, 8314086 + ... + 8362565.

Almost surely, 2^404242020240 is an apocalyptic number.

404242020240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404242020240 is an abundant number, since it is smaller than the sum of its proper divisors (861315746736).

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

404242020240 is a wasteful number, since it uses less digits than its factorization.

404242020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676768 (or 16676762 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 404242020240 its reverse (42020242404), we get a palindrome (446262262644).

The spelling of 404242020240 in words is "four hundred four billion, two hundred forty-two million, twenty thousand, two hundred forty".