394997268480 has 608 divisors, whose sum is σ = 1413309980160. Its totient is φ = 93616865280.

The previous prime is 394997268469. The next prime is 394997268521. The reversal of 394997268480 is 84862799493.

It is a tau number, because it is divible by the number of its divisors (608).

It is a super-2 number, since 2×394997268480² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1270087525 + ... + 1270087835.

Almost surely, 2^394997268480 is an apocalyptic number.

394997268480 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 394997268480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706654990080).

394997268480 is an abundant number, since it is smaller than the sum of its proper divisors (1018312711680).

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

394997268480 is an equidigital number, since it uses as much as digits as its factorization.

394997268480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 69.

The spelling of 394997268480 in words is "three hundred ninety-four billion, nine hundred ninety-seven million, two hundred sixty-eight thousand, four hundred eighty".