394728967 has 8 divisors (see below), whose sum is σ = 436120416. Its totient is φ = 355356672.

The previous prime is 394728953. The next prime is 394728979. The reversal of 394728967 is 769827493.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394728967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394728937) 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, 504378 + ... + 505159.

It is an arithmetic number, because the mean of its divisors is an integer number (54515052).

Almost surely, 2^394728967 is an apocalyptic number.

394728967 is a deficient number, since it is larger than the sum of its proper divisors (41391449).

394728967 is a wasteful number, since it uses less digits than its factorization.

394728967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009577.

The product of its digits is 4572288, while the sum is 55.

The square root of 394728967 is about 19867.7871691842. The cubic root of 394728967 is about 733.5555366361. Note that the first 4 decimals are identical.

The spelling of 394728967 in words is "three hundred ninety-four million, seven hundred twenty-eight thousand, nine hundred sixty-seven".