394008849 has 48 divisors (see below), whose sum is σ = 631717632. Its totient is φ = 235125504.

The previous prime is 394008841. The next prime is 394008869. The reversal of 394008849 is 948800493.

It is a happy number.

It is not a de Polignac number, because 394008849 - 2³ = 394008841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394008841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 753102 + ... + 753624.

It is an arithmetic number, because the mean of its divisors is an integer number (13160784).

Almost surely, 2^394008849 is an apocalyptic number.

394008849 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

394008849 is a deficient number, since it is larger than the sum of its proper divisors (237708783).

394008849 is a wasteful number, since it uses less digits than its factorization.

394008849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 394008849 is about 19849.6561431174. The cubic root of 394008849 is about 733.1091813316.

The spelling of 394008849 in words is "three hundred ninety-four million, eight thousand, eight hundred forty-nine".