394514833440 has 384 divisors, whose sum is σ = 1539794188800. Its totient is φ = 82678284288.

The previous prime is 394514833439. The next prime is 394514833441. The reversal of 394514833440 is 44338415493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (394514833439) and next prime (394514833441).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 394514833440.

It is not an unprimeable number, because it can be changed into a prime (394514833441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6478012 + ... + 6538628.

It is an arithmetic number, because the mean of its divisors is an integer number (4009880700).

Almost surely, 2^394514833440 is an apocalyptic number.

394514833440 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 394514833440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769897094400).

394514833440 is an abundant number, since it is smaller than the sum of its proper divisors (1145279355360).

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

394514833440 is a wasteful number, since it uses less digits than its factorization.

394514833440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60804 (or 60796 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 394514833440 in words is "three hundred ninety-four billion, five hundred fourteen million, eight hundred thirty-three thousand, four hundred forty".