2978430626 has 16 divisors (see below), whose sum is σ = 4505225400. Its totient is φ = 1476734208.

The previous prime is 2978430607. The next prime is 2978430629. The reversal of 2978430626 is 6260348792.

2978430626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 54575²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 2978430625 + 1 = 54575^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (2978430629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123530 + ... + 145658.

Almost surely, 2^2978430626 is an apocalyptic number.

2978430626 is a deficient number, since it is larger than the sum of its proper divisors (1526794774).

2978430626 is a wasteful number, since it uses less digits than its factorization.

2978430626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22693.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 2978430626 is about 54575.0000091617. Note that the first 5 decimals coincide. The cubic root of 2978430626 is about 1438.7847620893.

The spelling of 2978430626 in words is "two billion, nine hundred seventy-eight million, four hundred thirty thousand, six hundred twenty-six".