2138406562 has 4 divisors (see below), whose sum is σ = 3207609846. Its totient is φ = 1069203280.

The previous prime is 2138406551. The next prime is 2138406563. The reversal of 2138406562 is 2656048312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1227030841 + 911375721 = 35029^2 + 30189^2 .

It is not an unprimeable number, because it can be changed into a prime (2138406563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534601639 + ... + 534601642.

Almost surely, 2^2138406562 is an apocalyptic number.

2138406562 is a deficient number, since it is larger than the sum of its proper divisors (1069203284).

2138406562 is a wasteful number, since it uses less digits than its factorization.

2138406562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069203283.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 2138406562 is about 46242.9082346688. The cubic root of 2138406562 is about 1288.3388192287.

The spelling of 2138406562 in words is "two billion, one hundred thirty-eight million, four hundred six thousand, five hundred sixty-two".