394694021272320 has 2880 divisors, whose sum is σ = 1870619063233536. Its totient is φ = 76930414018560.

The previous prime is 394694021272267. The next prime is 394694021272349. The reversal of 394694021272320 is 23272120496493.

394694021272320 is a `hidden beast` number, since 3 + 9 + 4 + 6 + 9 + 40 + 2 + 1 + 272 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (2880).

It is a super-2 number, since 2×394694021272320² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 41665151104 + ... + 41665160576.

Almost surely, 2^{394694021272320} is an apocalyptic number.

394694021272320 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 394694021272320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935309531616768).

394694021272320 is an abundant number, since it is smaller than the sum of its proper divisors (1475925041961216).

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

394694021272320 is a wasteful number, since it uses less digits than its factorization.

394694021272320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848 (or 9825 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 394694021272320 in words is "three hundred ninety-four trillion, six hundred ninety-four billion, twenty-one million, two hundred seventy-two thousand, three hundred twenty".