994388481 has 10 divisors (see below), whose sum is σ = 1485444642. Its totient is φ = 662925600.

The previous prime is 994388467. The next prime is 994388513. The reversal of 994388481 is 184883499.

It can be written as a sum of positive squares in only one way, i.e., 537497856 + 456890625 = 23184^2 + 21375^2 .

It is not a de Polignac number, because 994388481 - 2⁵ = 994388449 is a prime.

It is a super-2 number, since 2×994388481² = 1977616902290974722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (994388401) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6138120 + ... + 6138281.

Almost surely, 2^994388481 is an apocalyptic number.

It is an amenable number.

994388481 is a deficient number, since it is larger than the sum of its proper divisors (491056161).

994388481 is a wasteful number, since it uses less digits than its factorization.

994388481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12276413 (or 12276404 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 994388481 is about 31533.9258735731. The cubic root of 994388481 is about 998.1259839242.

The spelling of 994388481 in words is "nine hundred ninety-four million, three hundred eighty-eight thousand, four hundred eighty-one".