38345681 has 8 divisors (see below), whose sum is σ = 41990400. Its totient is φ = 34727440.

The previous prime is 38345633. The next prime is 38345683. The reversal of 38345681 is 18654383.

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

It is a de Polignac number, because none of the positive numbers 2^k-38345681 is a prime.

It is a super-2 number, since 2×38345681² = 2940782502707522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38345683) 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, 3521 + ... + 9438.

It is an arithmetic number, because the mean of its divisors is an integer number (5248800).

Almost surely, 2^38345681 is an apocalyptic number.

It is an amenable number.

38345681 is a deficient number, since it is larger than the sum of its proper divisors (3644719).

38345681 is a wasteful number, since it uses less digits than its factorization.

38345681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13239.

The product of its digits is 69120, while the sum is 38.

The square root of 38345681 is about 6192.3889574218. The cubic root of 38345681 is about 337.2139132099.

It can be divided in two parts, 383 and 45681, that added together give a palindrome (46064).

The spelling of 38345681 in words is "thirty-eight million, three hundred forty-five thousand, six hundred eighty-one".