394488725 has 6 divisors (see below), whose sum is σ = 489166050. Its totient is φ = 315590960.

The previous prime is 394488701. The next prime is 394488727. The reversal of 394488725 is 527884493.

It can be written as a sum of positive squares in 3 ways, for example, as 72573361 + 321915364 = 8519^2 + 17942^2 .

It is not a de Polignac number, because 394488725 - 2¹⁰ = 394487701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394488727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7889750 + ... + 7889799.

It is an arithmetic number, because the mean of its divisors is an integer number (81527675).

Almost surely, 2^394488725 is an apocalyptic number.

It is an amenable number.

394488725 is a deficient number, since it is larger than the sum of its proper divisors (94677325).

394488725 is a wasteful number, since it uses less digits than its factorization.

394488725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15779559 (or 15779554 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 394488725 is about 19861.7402309063. The cubic root of 394488725 is about 733.4066863034.

The spelling of 394488725 in words is "three hundred ninety-four million, four hundred eighty-eight thousand, seven hundred twenty-five".