38978311 has 2 divisors, whose sum is σ = 38978312. Its totient is φ = 38978310.

The previous prime is 38978299. The next prime is 38978321. The reversal of 38978311 is 11387983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38978311 - 2⁷ = 38978183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38978321) 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, 19489155 + 19489156.

It is an arithmetic number, because the mean of its divisors is an integer number (19489156).

Almost surely, 2^38978311 is an apocalyptic number.

38978311 is a deficient number, since it is larger than the sum of its proper divisors (1).

38978311 is an equidigital number, since it uses as much as digits as its factorization.

38978311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 38978311 is about 6243.2612471368. The cubic root of 38978311 is about 339.0582676997.

The spelling of 38978311 in words is "thirty-eight million, nine hundred seventy-eight thousand, three hundred eleven".