38404643 has 8 divisors (see below), whose sum is σ = 40981200. Its totient is φ = 35883648.

The previous prime is 38404637. The next prime is 38404651. The reversal of 38404643 is 34640483.

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 38404643 - 2⁴ = 38404627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38404603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12458 + ... + 15231.

It is an arithmetic number, because the mean of its divisors is an integer number (5122650).

Almost surely, 2^38404643 is an apocalyptic number.

38404643 is a deficient number, since it is larger than the sum of its proper divisors (2576557).

38404643 is a wasteful number, since it uses less digits than its factorization.

38404643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27781.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 38404643 is about 6197.1479730599. The cubic root of 38404643 is about 337.3866629959.

The spelling of 38404643 in words is "thirty-eight million, four hundred four thousand, six hundred forty-three".