42392690 has 8 divisors (see below), whose sum is σ = 76306860. Its totient is φ = 16957072.

The previous prime is 42392683. The next prime is 42392773. The reversal of 42392690 is 9629324.

42392690 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 35772361 + 6620329 = 5981^2 + 2573^2 .

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

It is a super-2 number, since 2×42392690² = 3594280330872200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42392690.

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 3 ways as a sum of consecutive naturals, for example, 2119625 + ... + 2119644.

Almost surely, 2^42392690 is an apocalyptic number.

42392690 is a deficient number, since it is larger than the sum of its proper divisors (33914170).

42392690 is a wasteful number, since it uses less digits than its factorization.

42392690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239276.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 42392690 is about 6510.9669020814. The cubic root of 42392690 is about 348.6826396627.

The spelling of 42392690 in words is "forty-two million, three hundred ninety-two thousand, six hundred ninety".