38224729 has 2 divisors, whose sum is σ = 38224730. Its totient is φ = 38224728.

The previous prime is 38224727. The next prime is 38224759. The reversal of 38224729 is 92742283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 18688329 = 4420^2 + 4323^2 .

It is a cyclic number.

It is not a de Polignac number, because 38224729 - 2¹ = 38224727 is a prime.

It is a super-2 number, since 2×38224729² = 2922259814246882, which contains 22 as substring.

Together with 38224727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38224723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19112364 + 19112365.

It is an arithmetic number, because the mean of its divisors is an integer number (19112365).

Almost surely, 2^38224729 is an apocalyptic number.

It is an amenable number.

38224729 is a deficient number, since it is larger than the sum of its proper divisors (1).

38224729 is an equidigital number, since it uses as much as digits as its factorization.

38224729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 38224729 is about 6182.6150616062. The cubic root of 38224729 is about 336.8589870458.

The spelling of 38224729 in words is "thirty-eight million, two hundred twenty-four thousand, seven hundred twenty-nine".