38212749 has 32 divisors (see below), whose sum is σ = 60192000. Its totient is φ = 23913792.

The previous prime is 38212747. The next prime is 38212771. The reversal of 38212749 is 94721283.

38212749 is a `hidden beast` number, since 382 + 1 + 274 + 9 = 666.

It is not a de Polignac number, because 38212749 - 2¹ = 38212747 is a prime.

It is a super-2 number, since 2×38212749² = 2920428372274002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38212747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28312 + ... + 29630.

It is an arithmetic number, because the mean of its divisors is an integer number (1881000).

Almost surely, 2^38212749 is an apocalyptic number.

It is an amenable number.

38212749 is a deficient number, since it is larger than the sum of its proper divisors (21979251).

38212749 is a wasteful number, since it uses less digits than its factorization.

38212749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1388 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 38212749 is about 6181.6461399857. The cubic root of 38212749 is about 336.8237917465.

It can be divided in two parts, 3821274 and 9, that added together give a palindrome (3821283).

The spelling of 38212749 in words is "thirty-eight million, two hundred twelve thousand, seven hundred forty-nine".