394010480640 has 416 divisors, whose sum is σ = 1443807256320. Its totient is φ = 89870303232.

The previous prime is 394010480599. The next prime is 394010480653. The reversal of 394010480640 is 46084010493.

It is a happy number.

It is a congruent number.

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, 368578026 + ... + 368579094.

It is an arithmetic number, because the mean of its divisors is an integer number (3470690520).

Almost surely, 2^394010480640 is an apocalyptic number.

394010480640 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 394010480640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721903628160).

394010480640 is an abundant number, since it is smaller than the sum of its proper divisors (1049796775680).

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

394010480640 is a wasteful number, since it uses less digits than its factorization.

394010480640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 394010480640 in words is "three hundred ninety-four billion, ten million, four hundred eighty thousand, six hundred forty".