40385042 has 4 divisors (see below), whose sum is σ = 60577566. Its totient is φ = 20192520.

The previous prime is 40385029. The next prime is 40385063. The reversal of 40385042 is 24058304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24790441 + 15594601 = 4979^2 + 3949^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10096259 + ... + 10096262.

Almost surely, 2^40385042 is an apocalyptic number.

40385042 is a deficient number, since it is larger than the sum of its proper divisors (20192524).

40385042 is a wasteful number, since it uses less digits than its factorization.

40385042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20192523.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 40385042 is about 6354.9226588527. The cubic root of 40385042 is about 343.0890412471.

The spelling of 40385042 in words is "forty million, three hundred eighty-five thousand, forty-two".