42396478 has 4 divisors (see below), whose sum is σ = 63594720. Its totient is φ = 21198238.

The previous prime is 42396451. The next prime is 42396481. The reversal of 42396478 is 87469324.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×42396478² = 3594922693608968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10599118 + ... + 10599121.

It is an arithmetic number, because the mean of its divisors is an integer number (15898680).

Almost surely, 2^42396478 is an apocalyptic number.

42396478 is a deficient number, since it is larger than the sum of its proper divisors (21198242).

42396478 is a wasteful number, since it uses less digits than its factorization.

42396478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21198241.

The product of its digits is 290304, while the sum is 43.

The square root of 42396478 is about 6511.2577893983. The cubic root of 42396478 is about 348.6930248690.

The spelling of 42396478 in words is "forty-two million, three hundred ninety-six thousand, four hundred seventy-eight".