6947400978 has 192 divisors, whose sum is σ = 18165288960. Its totient is φ = 1877904000.

The previous prime is 6947400973. The next prime is 6947400983. The reversal of 6947400978 is 8790047496.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6947400973) and next prime (6947400983).

It is not an unprimeable number, because it can be changed into a prime (6947400973) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 46009203 + ... + 46009353.

It is an arithmetic number, because the mean of its divisors is an integer number (94610880).

Almost surely, 2^6947400978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6947400978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9082644480).

6947400978 is an abundant number, since it is smaller than the sum of its proper divisors (11217887982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6947400978 is a wasteful number, since it uses less digits than its factorization.

6947400978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 6947400978 is about 83351.0706469929. The cubic root of 6947400978 is about 1908.1277833936.

The spelling of 6947400978 in words is "six billion, nine hundred forty-seven million, four hundred thousand, nine hundred seventy-eight".