42140844 has 24 divisors (see below), whose sum is σ = 109254320. Its totient is φ = 14046912.

The previous prime is 42140831. The next prime is 42140849. The reversal of 42140844 is 44804124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42140849) 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, 194989 + ... + 195204.

Almost surely, 2^42140844 is an apocalyptic number.

It is an amenable number.

42140844 is an abundant number, since it is smaller than the sum of its proper divisors (67113476).

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

42140844 is a wasteful number, since it uses less digits than its factorization.

42140844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390206 (or 390198 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 42140844 is about 6491.5979542791. The cubic root of 42140844 is about 347.9907845360.

Adding to 42140844 its reverse (44804124), we get a palindrome (86944968).

The spelling of 42140844 in words is "forty-two million, one hundred forty thousand, eight hundred forty-four".