42638927 has 4 divisors (see below), whose sum is σ = 42921456. Its totient is φ = 42356400.

The previous prime is 42638899. The next prime is 42638933. The reversal of 42638927 is 72983624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42638927 - 2¹² = 42634831 is a prime.

It is a super-2 number, since 2×42638927² = 3636156191422658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42638957) 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, 141038 + ... + 141339.

It is an arithmetic number, because the mean of its divisors is an integer number (10730364).

Almost surely, 2^42638927 is an apocalyptic number.

42638927 is a deficient number, since it is larger than the sum of its proper divisors (282529).

42638927 is a wasteful number, since it uses less digits than its factorization.

42638927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282528.

The product of its digits is 145152, while the sum is 41.

The square root of 42638927 is about 6529.8489262769. The cubic root of 42638927 is about 349.3564418806.

The spelling of 42638927 in words is "forty-two million, six hundred thirty-eight thousand, nine hundred twenty-seven".