391194048 has 168 divisors, whose sum is σ = 1233293952. Its totient is φ = 109057536.

The previous prime is 391193977. The next prime is 391194061. The reversal of 391194048 is 840491193.

It is a tau number, because it is divible by the number of its divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 391193997 and 391194015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404061 + ... + 405027.

Almost surely, 2^391194048 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 391194048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616646976).

391194048 is an abundant number, since it is smaller than the sum of its proper divisors (842099904).

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

391194048 is a wasteful number, since it uses less digits than its factorization.

391194048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 391194048 is about 19778.6260392374. The cubic root of 391194048 is about 731.3592290336.

The spelling of 391194048 in words is "three hundred ninety-one million, one hundred ninety-four thousand, forty-eight".