391728348 has 72 divisors (see below), whose sum is σ = 1143782640. Its totient is φ = 111720960.

The previous prime is 391728343. The next prime is 391728349. The reversal of 391728348 is 843827193.

It is a super-3 number, since 3×391728348³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391728343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22363 + ... + 35826.

It is an arithmetic number, because the mean of its divisors is an integer number (15885870).

Almost surely, 2^391728348 is an apocalyptic number.

It is an amenable number.

391728348 is an abundant number, since it is smaller than the sum of its proper divisors (752054292).

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

391728348 is a wasteful number, since it uses less digits than its factorization.

391728348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58227 (or 58222 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 391728348 is about 19792.1284353149. The cubic root of 391728348 is about 731.6920455034.

The spelling of 391728348 in words is "three hundred ninety-one million, seven hundred twenty-eight thousand, three hundred forty-eight".