38640713 has 8 divisors (see below), whose sum is σ = 40618368. Its totient is φ = 36687904.

The previous prime is 38640671. The next prime is 38640727. The reversal of 38640713 is 31704683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38640713 - 2⁶ = 38640649 is a prime.

It is a super-2 number, since 2×38640713² = 2986209402296738, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38640713.

It is not an unprimeable number, because it can be changed into a prime (38640793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2981 + ... + 9282.

It is an arithmetic number, because the mean of its divisors is an integer number (5077296).

Almost surely, 2^38640713 is an apocalyptic number.

It is an amenable number.

38640713 is a deficient number, since it is larger than the sum of its proper divisors (1977655).

38640713 is a wasteful number, since it uses less digits than its factorization.

38640713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12423.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 38640713 is about 6216.1654579009. The cubic root of 38640713 is about 338.0765468591.

The spelling of 38640713 in words is "thirty-eight million, six hundred forty thousand, seven hundred thirteen".