42440737 has 4 divisors (see below), whose sum is σ = 44674480. Its totient is φ = 40206996.

The previous prime is 42440719. The next prime is 42440743. The reversal of 42440737 is 73704424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42440737 - 2¹¹ = 42438689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42440699 and 42440708.

It is not an unprimeable number, because it can be changed into a prime (42440707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116843 + ... + 1116880.

It is an arithmetic number, because the mean of its divisors is an integer number (11168620).

Almost surely, 2^42440737 is an apocalyptic number.

It is an amenable number.

42440737 is a deficient number, since it is larger than the sum of its proper divisors (2233743).

42440737 is a wasteful number, since it uses less digits than its factorization.

42440737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233742.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 42440737 is about 6514.6555549776. The cubic root of 42440737 is about 348.8143198300.

The spelling of 42440737 in words is "forty-two million, four hundred forty thousand, seven hundred thirty-seven".