391344048 has 100 divisors (see below), whose sum is σ = 1148886288. Its totient is φ = 128580480.

The previous prime is 391344013. The next prime is 391344059. The reversal of 391344048 is 840443193.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89890 + ... + 94142.

Almost surely, 2^391344048 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 391344048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574443144).

391344048 is an abundant number, since it is smaller than the sum of its proper divisors (757542240).

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

391344048 is a wasteful number, since it uses less digits than its factorization.

391344048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344 (or 4329 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 391344048 is about 19782.4176480025. The cubic root of 391344048 is about 731.4526948947.

It can be divided in two parts, 3913 and 44048, that added together give a square (47961 = 219²).

The spelling of 391344048 in words is "three hundred ninety-one million, three hundred forty-four thousand, forty-eight".