42040386 has 12 divisors (see below), whose sum is σ = 91087542. Its totient is φ = 14013456.

The previous prime is 42040373. The next prime is 42040387. The reversal of 42040386 is 68304024.

It can be written as a sum of positive squares in only one way, i.e., 40564161 + 1476225 = 6369^2 + 1215^2 .

It is not an unprimeable number, because it can be changed into a prime (42040387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167771 + ... + 1167806.

Almost surely, 2^42040386 is an apocalyptic number.

42040386 is an abundant number, since it is smaller than the sum of its proper divisors (49047156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42040386 is a wasteful number, since it uses less digits than its factorization.

42040386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335585 (or 2335582 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 42040386 is about 6483.8557972861. The cubic root of 42040386 is about 347.7140437268.

The spelling of 42040386 in words is "forty-two million, forty thousand, three hundred eighty-six".