2978400008 has 8 divisors (see below), whose sum is σ = 5584500030. Its totient is φ = 1489200000.

The previous prime is 2978400001. The next prime is 2978400049. The reversal of 2978400008 is 8000048792.

It can be written as a sum of positive squares in only one way, i.e., 2737591684 + 240808324 = 52322^2 + 15518^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2978400001) by changing a digit.

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 as a sum of consecutive naturals, namely, 186149993 + ... + 186150008.

Almost surely, 2^2978400008 is an apocalyptic number.

It is an amenable number.

2978400008 is a deficient number, since it is larger than the sum of its proper divisors (2606100022).

2978400008 is a wasteful number, since it uses less digits than its factorization.

2978400008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372300007 (or 372300003 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 2978400008 is about 54574.7194953854. The cubic root of 2978400008 is about 1438.7798318796.

The spelling of 2978400008 in words is "two billion, nine hundred seventy-eight million, four hundred thousand, eight".