38706649 has 4 divisors (see below), whose sum is σ = 38720464. Its totient is φ = 38692836.

The previous prime is 38706643. The next prime is 38706673. The reversal of 38706649 is 94660783.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 38706649 - 2³ = 38706641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38706641) 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, 1047 + ... + 8860.

It is an arithmetic number, because the mean of its divisors is an integer number (9680116).

Almost surely, 2^38706649 is an apocalyptic number.

It is an amenable number.

38706649 is a deficient number, since it is larger than the sum of its proper divisors (13815).

38706649 is an equidigital number, since it uses as much as digits as its factorization.

38706649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13814.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 38706649 is about 6221.4667884672. The cubic root of 38706649 is about 338.2687340300.

The spelling of 38706649 in words is "thirty-eight million, seven hundred six thousand, six hundred forty-nine".