391404044 has 6 divisors (see below), whose sum is σ = 684957084. Its totient is φ = 195702020.

The previous prime is 391404037. The next prime is 391404049. The reversal of 391404044 is 440404193.

It is a super-3 number, since 3×391404044³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 391403998 and 391404016.

It is not an unprimeable number, because it can be changed into a prime (391404049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48925502 + ... + 48925509.

It is an arithmetic number, because the mean of its divisors is an integer number (114159514).

Almost surely, 2^391404044 is an apocalyptic number.

It is an amenable number.

391404044 is a deficient number, since it is larger than the sum of its proper divisors (293553040).

391404044 is a wasteful number, since it uses less digits than its factorization.

391404044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97851015 (or 97851013 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 391404044 is about 19783.9339869501. The cubic root of 391404044 is about 731.4900720600.

The spelling of 391404044 in words is "three hundred ninety-one million, four hundred four thousand, forty-four".