391849152 has 112 divisors (see below), whose sum is σ = 1069189632. Its totient is φ = 126592000.

The previous prime is 391849151. The next prime is 391849163. The reversal of 391849152 is 251948193.

Its product of digits (77760) is a multiple of the sum of its prime factors (486).

It is not an unprimeable number, because it can be changed into a prime (391849151) 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 in 15 ways as a sum of consecutive naturals, for example, 1561027 + ... + 1561277.

It is an arithmetic number, because the mean of its divisors is an integer number (9546336).

Almost surely, 2^391849152 is an apocalyptic number.

391849152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391849152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534594816).

391849152 is an abundant number, since it is smaller than the sum of its proper divisors (677340480).

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

391849152 is a wasteful number, since it uses less digits than its factorization.

391849152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 476 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 391849152 is about 19795.1800193886. The cubic root of 391849152 is about 731.7672525881.

The spelling of 391849152 in words is "three hundred ninety-one million, eight hundred forty-nine thousand, one hundred fifty-two".