38402681 has 2 divisors, whose sum is σ = 38402682. Its totient is φ = 38402680.

The previous prime is 38402669. The next prime is 38402701. The reversal of 38402681 is 18620483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 8317456 = 5485^2 + 2884^2 .

It is a cyclic number.

It is not a de Polignac number, because 38402681 - 2¹⁴ = 38386297 is a prime.

It is a super-2 number, since 2×38402681² = 2949531815975522, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (38402381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19201340 + 19201341.

It is an arithmetic number, because the mean of its divisors is an integer number (19201341).

Almost surely, 2^38402681 is an apocalyptic number.

It is an amenable number.

38402681 is a deficient number, since it is larger than the sum of its proper divisors (1).

38402681 is an equidigital number, since it uses as much as digits as its factorization.

38402681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 38402681 is about 6196.9896724135. The cubic root of 38402681 is about 337.3809174761.

The spelling of 38402681 in words is "thirty-eight million, four hundred two thousand, six hundred eighty-one".