38409819 has 16 divisors (see below), whose sum is σ = 59189760. Its totient is φ = 21700800.

The previous prime is 38409797. The next prime is 38409823. The reversal of 38409819 is 91890483.

It is not a de Polignac number, because 38409819 - 2¹¹ = 38407771 is a prime.

It is a super-2 number, since 2×38409819² = 2950628391225522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38409859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8407 + ... + 12144.

It is an arithmetic number, because the mean of its divisors is an integer number (3699360).

Almost surely, 2^38409819 is an apocalyptic number.

38409819 is a deficient number, since it is larger than the sum of its proper divisors (20779941).

38409819 is a wasteful number, since it uses less digits than its factorization.

38409819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20650.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 38409819 is about 6197.5655704478. The cubic root of 38409819 is about 337.4018194525.

The spelling of 38409819 in words is "thirty-eight million, four hundred nine thousand, eight hundred nineteen".