40042430 has 16 divisors (see below), whose sum is σ = 72155664. Its totient is φ = 15999360.

The previous prime is 40042427. The next prime is 40042441. The reversal of 40042430 is 3424004.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40042399 and 40042408.

It is a congruent number.

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, 11270 + ... + 14390.

It is an arithmetic number, because the mean of its divisors is an integer number (4509729).

Almost surely, 2^40042430 is an apocalyptic number.

40042430 is a deficient number, since it is larger than the sum of its proper divisors (32113234).

40042430 is a wasteful number, since it uses less digits than its factorization.

40042430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 40042430 is about 6327.9088172950. The cubic root of 40042430 is about 342.1160704029.

Adding to 40042430 its reverse (3424004), we get a palindrome (43466434).

The spelling of 40042430 in words is "forty million, forty-two thousand, four hundred thirty".