978477494 has 8 divisors (see below), whose sum is σ = 1468446408. Its totient is φ = 488995360.

The previous prime is 978477463. The next prime is 978477499. The reversal of 978477494 is 494774879.

978477494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (978477499) 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, 116627 + ... + 124734.

It is an arithmetic number, because the mean of its divisors is an integer number (183555801).

Almost surely, 2^978477494 is an apocalyptic number.

978477494 is a deficient number, since it is larger than the sum of its proper divisors (489968914).

978477494 is a wasteful number, since it uses less digits than its factorization.

978477494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243390.

The product of its digits is 14224896, while the sum is 59.

The square root of 978477494 is about 31280.6248978501. The cubic root of 978477494 is about 992.7737382569.

It can be divided in two parts, 9784 and 77494, that added together give a palindrome (87278).

The spelling of 978477494 in words is "nine hundred seventy-eight million, four hundred seventy-seven thousand, four hundred ninety-four".