2167978328 has 8 divisors (see below), whose sum is σ = 4064959380. Its totient is φ = 1083989160.

The previous prime is 2167978327. The next prime is 2167978339. The reversal of 2167978328 is 8238797612.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2167978328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2167978327) 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, 135498638 + ... + 135498653.

Almost surely, 2^2167978328 is an apocalyptic number.

It is an amenable number.

2167978328 is a deficient number, since it is larger than the sum of its proper divisors (1896981052).

2167978328 is a wasteful number, since it uses less digits than its factorization.

2167978328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270997297 (or 270997293 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 2167978328 is about 46561.5541836825. The cubic root of 2167978328 is about 1294.2504127872.

The spelling of 2167978328 in words is "two billion, one hundred sixty-seven million, nine hundred seventy-eight thousand, three hundred twenty-eight".