42390236 has 12 divisors (see below), whose sum is σ = 84780528. Its totient is φ = 18167232.

The previous prime is 42390223. The next prime is 42390239. The reversal of 42390236 is 63209324.

42390236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

42390236 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 42390199 and 42390208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390239) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 756941 + ... + 756996.

It is an arithmetic number, because the mean of its divisors is an integer number (7065044).

Almost surely, 2^42390236 is an apocalyptic number.

It is an amenable number.

42390236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42390236 is a wasteful number, since it uses less digits than its factorization.

42390236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513948 (or 1513946 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 42390236 is about 6510.7784480813. The cubic root of 42390236 is about 348.6759114295.

The spelling of 42390236 in words is "forty-two million, three hundred ninety thousand, two hundred thirty-six".