393728541 has 8 divisors (see below), whose sum is σ = 536141184. Its totient is φ = 256900800.

The previous prime is 393728539. The next prime is 393728609. The reversal of 393728541 is 145827393.

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

It is not a de Polignac number, because 393728541 - 2¹ = 393728539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 393728493 and 393728502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393728501) 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, 1396060 + ... + 1396341.

It is an arithmetic number, because the mean of its divisors is an integer number (67017648).

Almost surely, 2^393728541 is an apocalyptic number.

It is an amenable number.

393728541 is a deficient number, since it is larger than the sum of its proper divisors (142412643).

393728541 is a wasteful number, since it uses less digits than its factorization.

393728541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792451.

The product of its digits is 181440, while the sum is 42.

The square root of 393728541 is about 19842.5941096420. The cubic root of 393728541 is about 732.9352891969.

The spelling of 393728541 in words is "three hundred ninety-three million, seven hundred twenty-eight thousand, five hundred forty-one".