42400040424 has 32 divisors (see below), whose sum is σ = 121142973120. Its totient is φ = 12114297216.

The previous prime is 42400040401. The next prime is 42400040477. The reversal of 42400040424 is 42404000424.

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

It is a junction number, because it is equal to n+sod(n) for n = 42400040394 and 42400040403.

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, 126190429 + ... + 126190764.

It is an arithmetic number, because the mean of its divisors is an integer number (3785717910).

Almost surely, 2^42400040424 is an apocalyptic number.

It is an amenable number.

42400040424 is an abundant number, since it is smaller than the sum of its proper divisors (78742932696).

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

42400040424 is a wasteful number, since it uses less digits than its factorization.

42400040424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252381209 (or 252381205 counting only the distinct ones).

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

Adding to 42400040424 its reverse (42404000424), we get a palindrome (84804040848).

The spelling of 42400040424 in words is "forty-two billion, four hundred million, forty thousand, four hundred twenty-four".