42402440404 has 12 divisors (see below), whose sum is σ = 75220768084. Its totient is φ = 20910792384.

The previous prime is 42402440371. The next prime is 42402440419. The reversal of 42402440404 is 40404420424.

It can be written as a sum of positive squares in 2 ways, for example, as 11352476304 + 31049964100 = 106548^2 + 176210^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72606627 + ... + 72607210.

Almost surely, 2^42402440404 is an apocalyptic number.

It is an amenable number.

42402440404 is a deficient number, since it is larger than the sum of its proper divisors (32818327680).

42402440404 is a wasteful number, since it uses less digits than its factorization.

42402440404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145213914 (or 145213912 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 42402440404 its reverse (40404420424), we get a palindrome (82806860828).

The spelling of 42402440404 in words is "forty-two billion, four hundred two million, four hundred forty thousand, four hundred four".