391226481360 has 1280 divisors, whose sum is σ = 1689091891200. Its totient is φ = 82838661120.

The previous prime is 391226481337. The next prime is 391226481377. The reversal of 391226481360 is 63184622193.

391226481360 is a `hidden beast` number, since 3 + 91 + 2 + 26 + 481 + 3 + 60 = 666.

It is a Cunningham number, because it is equal to 625481²-1.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 475365909 + ... + 475366731.

It is an arithmetic number, because the mean of its divisors is an integer number (1319603040).

Almost surely, 2^391226481360 is an apocalyptic number.

391226481360 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 391226481360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844545945600).

391226481360 is an abundant number, since it is smaller than the sum of its proper divisors (1297865409840).

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

391226481360 is a wasteful number, since it uses less digits than its factorization.

391226481360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 391226481360 in words is "three hundred ninety-one billion, two hundred twenty-six million, four hundred eighty-one thousand, three hundred sixty".