9780478 has 8 divisors (see below), whose sum is σ = 15442920. Its totient is φ = 4632840.

The previous prime is 9780473. The next prime is 9780487. The reversal of 9780478 is 8740879.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9780473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128653 + ... + 128728.

It is an arithmetic number, because the mean of its divisors is an integer number (1930365).

Almost surely, 2^9780478 is an apocalyptic number.

9780478 is a deficient number, since it is larger than the sum of its proper divisors (5662442).

9780478 is a wasteful number, since it uses less digits than its factorization.

9780478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257402.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 9780478 is about 3127.3755770614. The cubic root of 9780478 is about 213.8553044050.

The spelling of 9780478 in words is "nine million, seven hundred eighty thousand, four hundred seventy-eight".