38897309 has 16 divisors (see below), whose sum is σ = 45515520. Its totient is φ = 32847360.

The previous prime is 38897303. The next prime is 38897311. The reversal of 38897309 is 90379883.

It is a cyclic number.

It is not a de Polignac number, because 38897309 - 2⁴ = 38897293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38897303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13457 + ... + 16089.

It is an arithmetic number, because the mean of its divisors is an integer number (2844720).

Almost surely, 2^38897309 is an apocalyptic number.

It is an amenable number.

38897309 is a deficient number, since it is larger than the sum of its proper divisors (6618211).

38897309 is a wasteful number, since it uses less digits than its factorization.

38897309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 38897309 is about 6236.7707188897. The cubic root of 38897309 is about 338.8232357554.

The spelling of 38897309 in words is "thirty-eight million, eight hundred ninety-seven thousand, three hundred nine".