42397378 has 8 divisors (see below), whose sum is σ = 64467468. Its totient is φ = 20908224.

The previous prime is 42397361. The next prime is 42397387. The reversal of 42397378 is 87379324.

42397378 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 41563809 + 833569 = 6447^2 + 913^2 .

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

It is a super-2 number, since 2×42397378² = 3595075322549768, which contains 22 as substring.

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, 145051 + ... + 145342.

Almost surely, 2^42397378 is an apocalyptic number.

42397378 is a deficient number, since it is larger than the sum of its proper divisors (22070090).

42397378 is a wasteful number, since it uses less digits than its factorization.

42397378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290468.

The product of its digits is 254016, while the sum is 43.

The square root of 42397378 is about 6511.3269001026. The cubic root of 42397378 is about 348.6954922241.

The spelling of 42397378 in words is "forty-two million, three hundred ninety-seven thousand, three hundred seventy-eight".