42388887 has 4 divisors (see below), whose sum is σ = 56518520. Its totient is φ = 28259256.

The previous prime is 42388883. The next prime is 42388891. The reversal of 42388887 is 78888324.

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

It is an interprime number because it is at equal distance from previous prime (42388883) and next prime (42388891).

It is not a de Polignac number, because 42388887 - 2² = 42388883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42388883) 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, 7064812 + ... + 7064817.

It is an arithmetic number, because the mean of its divisors is an integer number (14129630).

Almost surely, 2^42388887 is an apocalyptic number.

42388887 is a deficient number, since it is larger than the sum of its proper divisors (14129633).

42388887 is a wasteful number, since it uses less digits than its factorization.

42388887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14129632.

The product of its digits is 688128, while the sum is 48.

The square root of 42388887 is about 6510.6748498140. The cubic root of 42388887 is about 348.6722127099.

The spelling of 42388887 in words is "forty-two million, three hundred eighty-eight thousand, eight hundred eighty-seven".