42688538 has 8 divisors (see below), whose sum is σ = 64078560. Its totient is φ = 21329020.

The previous prime is 42688511. The next prime is 42688553. The reversal of 42688538 is 83588624.

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

It is a super-3 number, since 3×42688538³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (8009820).

Almost surely, 2^42688538 is an apocalyptic number.

42688538 is a deficient number, since it is larger than the sum of its proper divisors (21390022).

42688538 is a wasteful number, since it uses less digits than its factorization.

42688538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15252.

The product of its digits is 368640, while the sum is 44.

The square root of 42688538 is about 6533.6466081355. The cubic root of 42688538 is about 349.4918831000.

The spelling of 42688538 in words is "forty-two million, six hundred eighty-eight thousand, five hundred thirty-eight".