40000000042 has 16 divisors (see below), whose sum is σ = 62859900672. Its totient is φ = 19065958560.

The previous prime is 40000000031. The next prime is 40000000069. The reversal of 40000000042 is 24000000004.

It is a junction number, because it is equal to n+sod(n) for n = 39999999956 and 40000000028.

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, 4810483 + ... + 4818790.

It is an arithmetic number, because the mean of its divisors is an integer number (3928743792).

Almost surely, 2^40000000042 is an apocalyptic number.

40000000042 is a deficient number, since it is larger than the sum of its proper divisors (22859900630).

40000000042 is a wasteful number, since it uses less digits than its factorization.

40000000042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9629373.

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 40000000042 its reverse (24000000004), we get a palindrome (64000000046).

It can be divided in two parts, 4000000004 and 2, that multiplied together give a palindrome (8000000008).

The spelling of 40000000042 in words is "forty billion, forty-two", and thus it is an aban number, an eban number, and an uban number.