2188972948 has 6 divisors (see below), whose sum is σ = 3830702666. Its totient is φ = 1094486472.

The previous prime is 2188972943. The next prime is 2188972967. The reversal of 2188972948 is 8492798812.

It can be written as a sum of positive squares in only one way, i.e., 1425666564 + 763306384 = 37758^2 + 27628^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2188972892 and 2188972901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188972943) 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, 273621615 + ... + 273621622.

Almost surely, 2^2188972948 is an apocalyptic number.

It is an amenable number.

2188972948 is a deficient number, since it is larger than the sum of its proper divisors (1641729718).

2188972948 is a wasteful number, since it uses less digits than its factorization.

2188972948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547243241 (or 547243239 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 58.

The square root of 2188972948 is about 46786.4611613232. The cubic root of 2188972948 is about 1298.4148229026.

The spelling of 2188972948 in words is "two billion, one hundred eighty-eight million, nine hundred seventy-two thousand, nine hundred forty-eight".