42400012040 has 16 divisors (see below), whose sum is σ = 95400027180. Its totient is φ = 16960004800.

The previous prime is 42400011959. The next prime is 42400012073. The reversal of 42400012040 is 4021000424.

It can be written as a sum of positive squares in 2 ways, for example, as 37401239236 + 4998772804 = 193394^2 + 70702^2 .

It is a super-2 number, since 2×42400012040² (a number of 22 digits) contains 22 as substring.

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, 530000111 + ... + 530000190.

Almost surely, 2^42400012040 is an apocalyptic number.

42400012040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42400012040 is an abundant number, since it is smaller than the sum of its proper divisors (53000015140).

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

42400012040 is a wasteful number, since it uses less digits than its factorization.

42400012040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060000312 (or 1060000308 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 42400012040 its reverse (4021000424), we get a palindrome (46421012464).

The spelling of 42400012040 in words is "forty-two billion, four hundred million, twelve thousand, forty".