42440739 has 16 divisors (see below), whose sum is σ = 63402240. Its totient is φ = 25025760.

The previous prime is 42440719. The next prime is 42440743. The reversal of 42440739 is 93704424.

It is not a de Polignac number, because 42440739 - 2⁵ = 42440707 is a prime.

It is a super-2 number, since 2×42440739² = 3602432653732242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42440719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16159 + ... + 18600.

It is an arithmetic number, because the mean of its divisors is an integer number (3962640).

Almost surely, 2^42440739 is an apocalyptic number.

42440739 is a deficient number, since it is larger than the sum of its proper divisors (20961501).

42440739 is a wasteful number, since it uses less digits than its factorization.

42440739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34810.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 42440739 is about 6514.6557084776. The cubic root of 42440739 is about 348.8143253093.

The spelling of 42440739 in words is "forty-two million, four hundred forty thousand, seven hundred thirty-nine".