2147206388 has 6 divisors (see below), whose sum is σ = 3757611186. Its totient is φ = 1073603192.

The previous prime is 2147206387. The next prime is 2147206433. The reversal of 2147206388 is 8836027412.

It can be written as a sum of positive squares in only one way, i.e., 1998805264 + 148401124 = 44708^2 + 12182^2 .

It is a super-2 number, since 2×2147206388² = 9220990545336013088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147206387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268400795 + ... + 268400802.

It is an arithmetic number, because the mean of its divisors is an integer number (626268531).

Almost surely, 2^2147206388 is an apocalyptic number.

It is an amenable number.

2147206388 is a deficient number, since it is larger than the sum of its proper divisors (1610404798).

2147206388 is a wasteful number, since it uses less digits than its factorization.

2147206388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536801601 (or 536801599 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 2147206388 is about 46337.9583926612. The cubic root of 2147206388 is about 1290.1036288763.

The spelling of 2147206388 in words is "two billion, one hundred forty-seven million, two hundred six thousand, three hundred eighty-eight".