42040402 has 16 divisors (see below), whose sum is σ = 65274624. Its totient is φ = 20286000.

The previous prime is 42040387. The next prime is 42040409. The reversal of 42040402 is 20404024.

It is not an unprimeable number, because it can be changed into a prime (42040409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29752 + ... + 31132.

It is an arithmetic number, because the mean of its divisors is an integer number (4079664).

Almost surely, 2^42040402 is an apocalyptic number.

42040402 is a deficient number, since it is larger than the sum of its proper divisors (23234222).

42040402 is a wasteful number, since it uses less digits than its factorization.

42040402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 42040402 is about 6483.8570311197. The cubic root of 42040402 is about 347.7140878385.

Adding to 42040402 its reverse (20404024), we get a palindrome (62444426).

The spelling of 42040402 in words is "forty-two million, forty thousand, four hundred two".