38648761 has 4 divisors (see below), whose sum is σ = 39031524. Its totient is φ = 38266000.

The previous prime is 38648759. The next prime is 38648789. The reversal of 38648761 is 16784683.

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 24810361 + 13838400 = 4981^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 38648761 - 2¹ = 38648759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38648741) 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, 191230 + ... + 191431.

It is an arithmetic number, because the mean of its divisors is an integer number (9757881).

Almost surely, 2^38648761 is an apocalyptic number.

It is an amenable number.

38648761 is a deficient number, since it is larger than the sum of its proper divisors (382763).

38648761 is a wasteful number, since it uses less digits than its factorization.

38648761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382762.

The product of its digits is 193536, while the sum is 43.

The square root of 38648761 is about 6216.8127686138. The cubic root of 38648761 is about 338.1000165017.

The spelling of 38648761 in words is "thirty-eight million, six hundred forty-eight thousand, seven hundred sixty-one".