8942456978 has 48 divisors (see below), whose sum is σ = 16970577624. Its totient is φ = 3502598400.

The previous prime is 8942456923. The next prime is 8942457037. The reversal of 8942456978 is 8796542498.

It can be written as a sum of positive squares in 4 ways, for example, as 7196637889 + 1745819089 = 84833^2 + 41783^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8942456978.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93926 + ... + 163422.

Almost surely, 2^8942456978 is an apocalyptic number.

8942456978 is a deficient number, since it is larger than the sum of its proper divisors (8028120646).

8942456978 is a wasteful number, since it uses less digits than its factorization.

8942456978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69627 (or 69620 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 62.

The square root of 8942456978 is about 94564.5651288050. The cubic root of 8942456978 is about 2075.6412188130.

The spelling of 8942456978 in words is "eight billion, nine hundred forty-two million, four hundred fifty-six thousand, nine hundred seventy-eight".