38779805 has 8 divisors (see below), whose sum is σ = 49273272. Its totient is φ = 29198848.

The previous prime is 38779787. The next prime is 38779837. The reversal of 38779805 is 50897783.

It can be written as a sum of positive squares in 4 ways, for example, as 376996 + 38402809 = 614^2 + 6197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38779805 - 2⁸ = 38779549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38779805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228032 + ... + 228201.

It is an arithmetic number, because the mean of its divisors is an integer number (6159159).

Almost surely, 2^38779805 is an apocalyptic number.

It is an amenable number.

38779805 is a deficient number, since it is larger than the sum of its proper divisors (10493467).

38779805 is a wasteful number, since it uses less digits than its factorization.

38779805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456255.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 38779805 is about 6227.3433340390. The cubic root of 38779805 is about 338.4817104753.

The spelling of 38779805 in words is "thirty-eight million, seven hundred seventy-nine thousand, eight hundred five".