42091392 has 96 divisors (see below), whose sum is σ = 130117320. Its totient is φ = 12020736.

The previous prime is 42091391. The next prime is 42091409. The reversal of 42091392 is 29319024.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42091391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17698 + ... + 19934.

Almost surely, 2^42091392 is an apocalyptic number.

42091392 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42091392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65058660).

42091392 is an abundant number, since it is smaller than the sum of its proper divisors (88025928).

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

42091392 is a wasteful number, since it uses less digits than its factorization.

42091392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268 (or 2249 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 42091392 is about 6487.7879126864. The cubic root of 42091392 is about 347.8546096320.

The spelling of 42091392 in words is "forty-two million, ninety-one thousand, three hundred ninety-two".