38747749 has 6 divisors (see below), whose sum is σ = 39432434. Its totient is φ = 38064720.

The previous prime is 38747729. The next prime is 38747759. The reversal of 38747749 is 94774783.

It can be written as a sum of positive squares in 3 ways, for example, as 220900 + 38526849 = 470^2 + 6207^2 .

It is not a de Polignac number, because 38747749 - 2⁹ = 38747237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38747729) 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, 48219 + ... + 49015.

Almost surely, 2^38747749 is an apocalyptic number.

It is an amenable number.

38747749 is a deficient number, since it is larger than the sum of its proper divisors (684685).

38747749 is an frugal number, since it uses more digits than its factorization.

38747749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 858 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 49.

The square root of 38747749 is about 6224.7689916976. The cubic root of 38747749 is about 338.3884199874.

It can be divided in two parts, 3874774 and 9, that added together give a palindrome (3874783).

The spelling of 38747749 in words is "thirty-eight million, seven hundred forty-seven thousand, seven hundred forty-nine".