391263360 has 128 divisors (see below), whose sum is σ = 1290340800. Its totient is φ = 100724736.

The previous prime is 391263337. The next prime is 391263401. The reversal of 391263360 is 63362193.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 52167 + ... + 59193.

Almost surely, 2^391263360 is an apocalyptic number.

391263360 is a gapful number since it is divisible by the number (30) 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 391263360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645170400).

391263360 is an abundant number, since it is smaller than the sum of its proper divisors (899077440).

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

391263360 is a wasteful number, since it uses less digits than its factorization.

391263360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078 (or 7066 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 391263360 is about 19780.3781561425. The cubic root of 391263360 is about 731.4024207075.

It can be divided in two parts, 39126 and 3360, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 391263360 in words is "three hundred ninety-one million, two hundred sixty-three thousand, three hundred sixty".