38197745 has 4 divisors (see below), whose sum is σ = 45837300. Its totient is φ = 30558192.

The previous prime is 38197741. The next prime is 38197763. The reversal of 38197745 is 54779183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24127744 + 14070001 = 4912^2 + 3751^2 .

It is a cyclic number.

It is not a de Polignac number, because 38197745 - 2² = 38197741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38197696 and 38197705.

It is not an unprimeable number, because it can be changed into a prime (38197741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3819770 + ... + 3819779.

It is an arithmetic number, because the mean of its divisors is an integer number (11459325).

Almost surely, 2^38197745 is an apocalyptic number.

It is an amenable number.

38197745 is a deficient number, since it is larger than the sum of its proper divisors (7639555).

38197745 is an equidigital number, since it uses as much as digits as its factorization.

38197745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7639554.

The product of its digits is 211680, while the sum is 44.

The square root of 38197745 is about 6180.4324282367. The cubic root of 38197745 is about 336.7797020480.

The spelling of 38197745 in words is "thirty-eight million, one hundred ninety-seven thousand, seven hundred forty-five".