42040380 has 24 divisors (see below), whose sum is σ = 117713232. Its totient is φ = 11210752.

The previous prime is 42040373. The next prime is 42040387. The reversal of 42040380 is 8304024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42040373) and next prime (42040387).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 350277 + ... + 350396.

It is an arithmetic number, because the mean of its divisors is an integer number (4904718).

Almost surely, 2^42040380 is an apocalyptic number.

It is an amenable number.

42040380 is an abundant number, since it is smaller than the sum of its proper divisors (75672852).

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

42040380 is a wasteful number, since it uses less digits than its factorization.

42040380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700685 (or 700683 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 42040380 is about 6483.8553345984. The cubic root of 42040380 is about 347.7140271849.

The spelling of 42040380 in words is "forty-two million, forty thousand, three hundred eighty".