38576821 has 6 divisors (see below), whose sum is σ = 40714422. Its totient is φ = 36546120.

The previous prime is 38576789. The next prime is 38576851. The reversal of 38576821 is 12867583.

It can be written as a sum of positive squares in only one way, i.e., 33802596 + 4774225 = 5814^2 + 2185^2 .

It is not a de Polignac number, because 38576821 - 2⁵ = 38576789 is a prime.

It is a super-2 number, since 2×38576821² = 2976342236932082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38576851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53070 + ... + 53791.

It is an arithmetic number, because the mean of its divisors is an integer number (6785737).

Almost surely, 2^38576821 is an apocalyptic number.

It is an amenable number.

38576821 is a deficient number, since it is larger than the sum of its proper divisors (2137601).

38576821 is a wasteful number, since it uses less digits than its factorization.

38576821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106899 (or 106880 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 38576821 is about 6211.0241506534. The cubic root of 38576821 is about 337.8901087619.

The spelling of 38576821 in words is "thirty-eight million, five hundred seventy-six thousand, eight hundred twenty-one".