2438039666 has 8 divisors (see below), whose sum is σ = 3872180700. Its totient is φ = 1147312768.

The previous prime is 2438039647. The next prime is 2438039689. The reversal of 2438039666 is 6669308342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1793946025 + 644093641 = 42355^2 + 25379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2438039666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35853491 + ... + 35853558.

Almost surely, 2^2438039666 is an apocalyptic number.

2438039666 is a deficient number, since it is larger than the sum of its proper divisors (1434141034).

2438039666 is a wasteful number, since it uses less digits than its factorization.

2438039666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71707068.

The product of its (nonzero) digits is 1119744, while the sum is 47.

The square root of 2438039666 is about 49376.5092528826. The cubic root of 2438039666 is about 1345.9024666096.

It can be divided in two parts, 24380 and 39666, that added together give a palindrome (64046).

The spelling of 2438039666 in words is "two billion, four hundred thirty-eight million, thirty-nine thousand, six hundred sixty-six".