978494408 has 16 divisors (see below), whose sum is σ = 1835490780. Its totient is φ = 489030208.

The previous prime is 978494389. The next prime is 978494431. The reversal of 978494408 is 804494879.

It can be written as a sum of positive squares in 2 ways, for example, as 812136004 + 166358404 = 28498^2 + 12898^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 978494408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7091 + ... + 44802.

Almost surely, 2^978494408 is an apocalyptic number.

It is an amenable number.

978494408 is a deficient number, since it is larger than the sum of its proper divisors (856996372).

978494408 is a wasteful number, since it uses less digits than its factorization.

978494408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54256 (or 54252 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 978494408 is about 31280.8952557308. The cubic root of 978494408 is about 992.7794585991.

The spelling of 978494408 in words is "nine hundred seventy-eight million, four hundred ninety-four thousand, four hundred eight".