38920489 has 2 divisors, whose sum is σ = 38920490. Its totient is φ = 38920488.

The previous prime is 38920481. The next prime is 38920513. The reversal of 38920489 is 98402983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21780889 + 17139600 = 4667^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 38920489 - 2³ = 38920481 is a prime.

It is not a weakly prime, because it can be changed into another prime (38920481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19460244 + 19460245.

It is an arithmetic number, because the mean of its divisors is an integer number (19460245).

Almost surely, 2^38920489 is an apocalyptic number.

It is an amenable number.

38920489 is a deficient number, since it is larger than the sum of its proper divisors (1).

38920489 is an equidigital number, since it uses as much as digits as its factorization.

38920489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 38920489 is about 6238.6287756205. The cubic root of 38920489 is about 338.8905271542.

The spelling of 38920489 in words is "thirty-eight million, nine hundred twenty thousand, four hundred eighty-nine".