38809957 has 4 divisors (see below), whose sum is σ = 39194316. Its totient is φ = 38425600.

The previous prime is 38809943. The next prime is 38809961. The reversal of 38809957 is 75990883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27311076 + 11498881 = 5226^2 + 3391^2 .

It is a cyclic number.

It is not a de Polignac number, because 38809957 - 2¹⁹ = 38285669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38809957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38809937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192028 + ... + 192229.

It is an arithmetic number, because the mean of its divisors is an integer number (9798579).

Almost surely, 2^38809957 is an apocalyptic number.

It is an amenable number.

38809957 is a deficient number, since it is larger than the sum of its proper divisors (384359).

38809957 is a wasteful number, since it uses less digits than its factorization.

38809957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384358.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 38809957 is about 6229.7637996958. The cubic root of 38809957 is about 338.5694129670.

The spelling of 38809957 in words is "thirty-eight million, eight hundred nine thousand, nine hundred fifty-seven".