42403438 has 32 divisors (see below), whose sum is σ = 79688448. Its totient is φ = 16440000.

The previous prime is 42403433. The next prime is 42403441. The reversal of 42403438 is 83430424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42403433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38106 + ... + 39202.

It is an arithmetic number, because the mean of its divisors is an integer number (2490264).

Almost surely, 2^42403438 is an apocalyptic number.

42403438 is a deficient number, since it is larger than the sum of its proper divisors (37285010).

42403438 is a wasteful number, since it uses less digits than its factorization.

42403438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 42403438 is about 6511.7922264151. The cubic root of 42403438 is about 348.7121048396.

The spelling of 42403438 in words is "forty-two million, four hundred three thousand, four hundred thirty-eight".