394404471 has 40 divisors (see below), whose sum is σ = 638432784. Its totient is φ = 241678080.

The previous prime is 394404433. The next prime is 394404481. The reversal of 394404471 is 174404493.

It is not a de Polignac number, because 394404471 - 2¹³ = 394396279 is a prime.

It is a super-3 number, since 3×394404471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394404421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55881 + ... + 62541.

Almost surely, 2^394404471 is an apocalyptic number.

394404471 is a deficient number, since it is larger than the sum of its proper divisors (244028313).

394404471 is a wasteful number, since it uses less digits than its factorization.

394404471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733 (or 6724 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 394404471 is about 19859.6191051087. The cubic root of 394404471 is about 733.3544694780.

The spelling of 394404471 in words is "three hundred ninety-four million, four hundred four thousand, four hundred seventy-one".