42390312 has 32 divisors (see below), whose sum is σ = 106202400. Its totient is φ = 14099904.

The previous prime is 42390307. The next prime is 42390317. The reversal of 42390312 is 21309324.

It is an interprime number because it is at equal distance from previous prime (42390307) and next prime (42390317).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (42390317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11514 + ... + 14742.

It is an arithmetic number, because the mean of its divisors is an integer number (3318825).

Almost surely, 2^42390312 is an apocalyptic number.

It is an amenable number.

42390312 is an abundant number, since it is smaller than the sum of its proper divisors (63812088).

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

42390312 is a wasteful number, since it uses less digits than its factorization.

42390312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3781 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 42390312 is about 6510.7842845544. The cubic root of 42390312 is about 348.6761198057.

Adding to 42390312 its reverse (21309324), we get a palindrome (63699636).

The spelling of 42390312 in words is "forty-two million, three hundred ninety thousand, three hundred twelve".