42738445 has 8 divisors (see below), whose sum is σ = 51462936. Its totient is φ = 34072896.

The previous prime is 42738433. The next prime is 42738457. The reversal of 42738445 is 54483724.

It is an interprime number because it is at equal distance from previous prime (42738433) and next prime (42738457).

It can be written as a sum of positive squares in 4 ways, for example, as 5026564 + 37711881 = 2242^2 + 6141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42738445 - 2⁵ = 42738413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13122 + ... + 16051.

It is an arithmetic number, because the mean of its divisors is an integer number (6432867).

Almost surely, 2^42738445 is an apocalyptic number.

It is an amenable number.

42738445 is a deficient number, since it is larger than the sum of its proper divisors (8724491).

42738445 is a wasteful number, since it uses less digits than its factorization.

42738445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29471.

The product of its digits is 107520, while the sum is 37.

The square root of 42738445 is about 6537.4647226582. The cubic root of 42738445 is about 349.6280265824.

The spelling of 42738445 in words is "forty-two million, seven hundred thirty-eight thousand, four hundred forty-five".