42091384 has 16 divisors (see below), whose sum is σ = 83075400. Its totient is φ = 19937952.

The previous prime is 42091363. The next prime is 42091391. The reversal of 42091384 is 48319024.

It is a super-3 number, since 3×42091384³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

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, 138307 + ... + 138610.

Almost surely, 2^42091384 is an apocalyptic number.

It is an amenable number.

42091384 is a deficient number, since it is larger than the sum of its proper divisors (40984016).

42091384 is a wasteful number, since it uses less digits than its factorization.

42091384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276942 (or 276938 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 42091384 is about 6487.7872961434. The cubic root of 42091384 is about 347.8545875940.

The spelling of 42091384 in words is "forty-two million, ninety-one thousand, three hundred eighty-four".