42391782 has 16 divisors (see below), whose sum is σ = 94204080. Its totient is φ = 14130576.

The previous prime is 42391759. The next prime is 42391861. The reversal of 42391782 is 28719324.

42391782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42391782² = 3594126362271048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392463 + ... + 392570.

It is an arithmetic number, because the mean of its divisors is an integer number (5887755).

Almost surely, 2^42391782 is an apocalyptic number.

42391782 is an abundant number, since it is smaller than the sum of its proper divisors (51812298).

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

42391782 is a wasteful number, since it uses less digits than its factorization.

42391782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785044 (or 785038 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 42391782 is about 6510.8971732012. The cubic root of 42391782 is about 348.6801501918.

The spelling of 42391782 in words is "forty-two million, three hundred ninety-one thousand, seven hundred eighty-two".