38691764 has 6 divisors (see below), whose sum is σ = 67710594. Its totient is φ = 19345880.

The previous prime is 38691761. The next prime is 38691781. The reversal of 38691764 is 46719683.

38691764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 38688400 + 3364 = 6220^2 + 58^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38691761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4836467 + ... + 4836474.

It is an arithmetic number, because the mean of its divisors is an integer number (11285099).

Almost surely, 2^38691764 is an apocalyptic number.

It is an amenable number.

38691764 is a deficient number, since it is larger than the sum of its proper divisors (29018830).

38691764 is a wasteful number, since it uses less digits than its factorization.

38691764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9672945 (or 9672943 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 38691764 is about 6220.2704121284. The cubic root of 38691764 is about 338.2253670133.

The spelling of 38691764 in words is "thirty-eight million, six hundred ninety-one thousand, seven hundred sixty-four".