42988139 has 8 divisors (see below), whose sum is σ = 43480800. Its totient is φ = 42498496.

The previous prime is 42988111. The next prime is 42988147. The reversal of 42988139 is 93188924.

It is a happy number.

42988139 is nontrivially palindromic in base 5.

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 42988139 - 2¹² = 42984043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42988139.

It is not an unprimeable number, because it can be changed into a prime (42988199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38639 + ... + 39735.

It is an arithmetic number, because the mean of its divisors is an integer number (5435100).

Almost surely, 2^42988139 is an apocalyptic number.

42988139 is a deficient number, since it is larger than the sum of its proper divisors (492661).

42988139 is a wasteful number, since it uses less digits than its factorization.

42988139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509.

The product of its digits is 124416, while the sum is 44.

The square root of 42988139 is about 6556.5340691557. The cubic root of 42988139 is about 350.3075908250.

The spelling of 42988139 in words is "forty-two million, nine hundred eighty-eight thousand, one hundred thirty-nine".