38513649 has 4 divisors (see below), whose sum is σ = 51351536. Its totient is φ = 25675764.

The previous prime is 38513647. The next prime is 38513663. The reversal of 38513649 is 94631583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 38513649 - 2¹ = 38513647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38513647) 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, 6418939 + ... + 6418944.

It is an arithmetic number, because the mean of its divisors is an integer number (12837884).

Almost surely, 2^38513649 is an apocalyptic number.

It is an amenable number.

38513649 is a deficient number, since it is larger than the sum of its proper divisors (12837887).

38513649 is a wasteful number, since it uses less digits than its factorization.

38513649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12837886.

The product of its digits is 77760, while the sum is 39.

The square root of 38513649 is about 6205.9365932952. The cubic root of 38513649 is about 337.7055691396.

The spelling of 38513649 in words is "thirty-eight million, five hundred thirteen thousand, six hundred forty-nine".