391560480 has 216 divisors, whose sum is σ = 1391241852. Its totient is φ = 104136192.

The previous prime is 391560479. The next prime is 391560503. The reversal of 391560480 is 84065193.

391560480 is a `hidden beast` number, since 3 + 91 + 560 + 4 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 390615696 + 944784 = 19764^2 + 972^2 .

It is a tau number, because it is divible by the number of its divisors (216).

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1049574 + ... + 1049946.

Almost surely, 2^391560480 is an apocalyptic number.

391560480 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 391560480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695620926).

391560480 is an abundant number, since it is smaller than the sum of its proper divisors (999681372).

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

391560480 is an frugal number, since it uses more digits than its factorization.

391560480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 391560480 is about 19787.8872040448. The cubic root of 391560480 is about 731.5875128340.

The spelling of 391560480 in words is "three hundred ninety-one million, five hundred sixty thousand, four hundred eighty".