391649412 has 192 divisors, whose sum is σ = 1196310528. Its totient is φ = 97574400.

The previous prime is 391649407. The next prime is 391649441. The reversal of 391649412 is 214946193.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3465868 + ... + 3465980.

It is an arithmetic number, because the mean of its divisors is an integer number (6230784).

Almost surely, 2^391649412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391649412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598155264).

391649412 is an abundant number, since it is smaller than the sum of its proper divisors (804661116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391649412 is a wasteful number, since it uses less digits than its factorization.

391649412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 167 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 391649412 is about 19790.1342087415. The cubic root of 391649412 is about 731.6428951815.

The spelling of 391649412 in words is "three hundred ninety-one million, six hundred forty-nine thousand, four hundred twelve".