38669805 has 42 divisors (see below), whose sum is σ = 70255854. Its totient is φ = 20423664.

The previous prime is 38669801. The next prime is 38669863. The reversal of 38669805 is 50896683.

38669805 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 7733961 = 5562^2 + 2781^2 .

It is not a de Polignac number, because 38669805 - 2² = 38669801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38669801) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 375384 + ... + 375486.

Almost surely, 2^38669805 is an apocalyptic number.

It is an amenable number.

38669805 is a deficient number, since it is larger than the sum of its proper divisors (31586049).

38669805 is an frugal number, since it uses more digits than its factorization.

38669805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 38669805 is about 6218.5050454269. The cubic root of 38669805 is about 338.1613697905.

Multiplying 38669805 by its sum of digits (45), we get a square (1740141225 = 41715²).

38669805 divided by its sum of digits (45) gives a square (859329 = 927²).

The spelling of 38669805 in words is "thirty-eight million, six hundred sixty-nine thousand, eight hundred five".