38572813 has 8 divisors (see below), whose sum is σ = 42250680. Its totient is φ = 35051520.

The previous prime is 38572789. The next prime is 38572829. The reversal of 38572813 is 31827583.

It can be written as a sum of positive squares in 4 ways, for example, as 22676644 + 15896169 = 4762^2 + 3987^2 .

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 38572813 - 2⁹ = 38572301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38572883) 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 in 7 ways as a sum of consecutive naturals, for example, 38628 + ... + 39613.

It is an arithmetic number, because the mean of its divisors is an integer number (5281335).

Almost surely, 2^38572813 is an apocalyptic number.

It is an amenable number.

38572813 is a deficient number, since it is larger than the sum of its proper divisors (3677867).

38572813 is a wasteful number, since it uses less digits than its factorization.

38572813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78287.

The product of its digits is 40320, while the sum is 37.

The square root of 38572813 is about 6210.7014901700. The cubic root of 38572813 is about 337.8784064804.

It can be divided in two parts, 3857 and 2813, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 38572813 in words is "thirty-eight million, five hundred seventy-two thousand, eight hundred thirteen".