394490070648 has 24 divisors (see below), whose sum is σ = 1068410608200. Its totient is φ = 131496690192.

The previous prime is 394490070647. The next prime is 394490070661. The reversal of 394490070648 is 846070094493.

It is a happy number.

394490070648 is a `hidden beast` number, since 3 + 94 + 490 + 0 + 7 + 0 + 64 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×394490070648² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 394490070594 and 394490070603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394490070647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2739514308 + ... + 2739514451.

It is an arithmetic number, because the mean of its divisors is an integer number (44517108675).

Almost surely, 2^394490070648 is an apocalyptic number.

It is an amenable number.

394490070648 is an abundant number, since it is smaller than the sum of its proper divisors (673920537552).

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

394490070648 is a wasteful number, since it uses less digits than its factorization.

394490070648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479028771 (or 5479028764 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 394490070648 in words is "three hundred ninety-four billion, four hundred ninety million, seventy thousand, six hundred forty-eight".