394777481 has 8 divisors (see below), whose sum is σ = 451352640. Its totient is φ = 338246928.

The previous prime is 394777477. The next prime is 394777483. The reversal of 394777481 is 184777493.

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

It is a cyclic number.

It is not a de Polignac number, because 394777481 - 2² = 394777477 is a prime.

It is a super-2 number, since 2×394777481² = 311698519009410722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394777483) 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, 10670 + ... + 30056.

It is an arithmetic number, because the mean of its divisors is an integer number (56419080).

Almost surely, 2^394777481 is an apocalyptic number.

It is an amenable number.

394777481 is a deficient number, since it is larger than the sum of its proper divisors (56575159).

394777481 is a wasteful number, since it uses less digits than its factorization.

394777481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22303.

The product of its digits is 1185408, while the sum is 50.

The square root of 394777481 is about 19869.0080527439. The cubic root of 394777481 is about 733.5855878514.

The spelling of 394777481 in words is "three hundred ninety-four million, seven hundred seventy-seven thousand, four hundred eighty-one".