394728499 has 12 divisors (see below), whose sum is σ = 440996080. Its totient is φ = 352954800.

The previous prime is 394728493. The next prime is 394728511. The reversal of 394728499 is 994827493.

It is not a de Polignac number, because 394728499 - 2⁷ = 394728371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394728493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19359 + ... + 34120.

Almost surely, 2^394728499 is an apocalyptic number.

394728499 is a deficient number, since it is larger than the sum of its proper divisors (46267581).

394728499 is a wasteful number, since it uses less digits than its factorization.

394728499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53562 (or 53551 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 55.

The square root of 394728499 is about 19867.7753913215. The cubic root of 394728499 is about 733.5552467291. Note that the first 3 decimals are identical.

The spelling of 394728499 in words is "three hundred ninety-four million, seven hundred twenty-eight thousand, four hundred ninety-nine".