42691128 has 32 divisors (see below), whose sum is σ = 111369600. Its totient is φ = 13611488.

The previous prime is 42691091. The next prime is 42691139. The reversal of 42691128 is 82119624.

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, 38118 + ... + 39221.

It is an arithmetic number, because the mean of its divisors is an integer number (3480300).

Almost surely, 2^42691128 is an apocalyptic number.

It is an amenable number.

42691128 is an abundant number, since it is smaller than the sum of its proper divisors (68678472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42691128 is a wasteful number, since it uses less digits than its factorization.

42691128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77371 (or 77367 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 42691128 is about 6533.8448099109. The cubic root of 42691128 is about 349.4989510837.

The spelling of 42691128 in words is "forty-two million, six hundred ninety-one thousand, one hundred twenty-eight".