42390770 has 8 divisors (see below), whose sum is σ = 76303404. Its totient is φ = 16956304.

The previous prime is 42390737. The next prime is 42390773. The reversal of 42390770 is 7709324.

It is a happy number.

42390770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42289009 + 101761 = 6503^2 + 319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42390773) 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, 2119529 + ... + 2119548.

Almost surely, 2^42390770 is an apocalyptic number.

42390770 is a deficient number, since it is larger than the sum of its proper divisors (33912634).

42390770 is a wasteful number, since it uses less digits than its factorization.

42390770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239084.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 42390770 is about 6510.8194568733. The cubic root of 42390770 is about 348.6773755414.

The spelling of 42390770 in words is "forty-two million, three hundred ninety thousand, seven hundred seventy".