2818638738 has 12 divisors (see below), whose sum is σ = 6107050638. Its totient is φ = 939546240.

The previous prime is 2818638737. The next prime is 2818638763. The reversal of 2818638738 is 8378368182.

It can be written as a sum of positive squares in only one way, i.e., 2800208889 + 18429849 = 52917^2 + 4293^2 .

It is not an unprimeable number, because it can be changed into a prime (2818638737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78295503 + ... + 78295538.

Almost surely, 2^2818638738 is an apocalyptic number.

2818638738 is an abundant number, since it is smaller than the sum of its proper divisors (3288411900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2818638738 is a wasteful number, since it uses less digits than its factorization.

2818638738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156591049 (or 156591046 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 2818638738 is about 53090.8536190557. The cubic root of 2818638738 is about 1412.5802790199.

The spelling of 2818638738 in words is "two billion, eight hundred eighteen million, six hundred thirty-eight thousand, seven hundred thirty-eight".