42390030 has 16 divisors (see below), whose sum is σ = 101736144. Its totient is φ = 11304000.

The previous prime is 42390001. The next prime is 42390031. The reversal of 42390030 is 3009324.

It is a junction number, because it is equal to n+sod(n) for n = 42389979 and 42390006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390031) 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, 706471 + ... + 706530.

It is an arithmetic number, because the mean of its divisors is an integer number (6358509).

Almost surely, 2^42390030 is an apocalyptic number.

42390030 is an abundant number, since it is smaller than the sum of its proper divisors (59346114).

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

42390030 is a wasteful number, since it uses less digits than its factorization.

42390030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413011.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 42390030 is about 6510.7626281412. The cubic root of 42390030 is about 348.6753466190.

Adding to 42390030 its reverse (3009324), we get a palindrome (45399354).

The spelling of 42390030 in words is "forty-two million, three hundred ninety thousand, thirty".