38849557 has 2 divisors, whose sum is σ = 38849558. Its totient is φ = 38849556.

The previous prime is 38849543. The next prime is 38849609. The reversal of 38849557 is 75594883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28313041 + 10536516 = 5321^2 + 3246^2 .

It is a cyclic number.

It is not a de Polignac number, because 38849557 - 2²³ = 30460949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38849557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38849537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19424778 + 19424779.

It is an arithmetic number, because the mean of its divisors is an integer number (19424779).

Almost surely, 2^38849557 is an apocalyptic number.

It is an amenable number.

38849557 is a deficient number, since it is larger than the sum of its proper divisors (1).

38849557 is an equidigital number, since it uses as much as digits as its factorization.

38849557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 49.

The square root of 38849557 is about 6232.9412800058. The cubic root of 38849557 is about 338.6845276805.

The spelling of 38849557 in words is "thirty-eight million, eight hundred forty-nine thousand, five hundred fifty-seven".