394728500 has 48 divisors (see below), whose sum is σ = 864776640. Its totient is φ = 157399200.

The previous prime is 394728493. The next prime is 394728511. The reversal of 394728500 is 5827493.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188459 + ... + 190541.

It is an arithmetic number, because the mean of its divisors is an integer number (18016180).

Almost surely, 2^394728500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394728500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432388320).

394728500 is an abundant number, since it is smaller than the sum of its proper divisors (470048140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394728500 is a wasteful number, since it uses less digits than its factorization.

394728500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 394728500 is about 19867.7754164879. The cubic root of 394728500 is about 733.5552473485. Note that the first 3 decimals are identical.

The spelling of 394728500 in words is "three hundred ninety-four million, seven hundred twenty-eight thousand, five hundred".