7219973978 has 16 divisors (see below), whose sum is σ = 12388469184. Its totient is φ = 3091431840.

The previous prime is 7219973977. The next prime is 7219973983. The reversal of 7219973978 is 8793799127.

It is a self number, because there is not a number n which added to its sum of digits gives 7219973978.

It is not an unprimeable number, because it can be changed into a prime (7219973977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221075 + ... + 251622.

It is an arithmetic number, because the mean of its divisors is an integer number (774279324).

Almost surely, 2^7219973978 is an apocalyptic number.

7219973978 is a deficient number, since it is larger than the sum of its proper divisors (5168495206).

7219973978 is a wasteful number, since it uses less digits than its factorization.

7219973978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473797.

The product of its digits is 12002256, while the sum is 62.

The square root of 7219973978 is about 84970.4300212727. The cubic root of 7219973978 is about 1932.7627375653.

The spelling of 7219973978 in words is "seven billion, two hundred nineteen million, nine hundred seventy-three thousand, nine hundred seventy-eight".