394778046 has 96 divisors (see below), whose sum is σ = 918465408. Its totient is φ = 112412160.

The previous prime is 394778017. The next prime is 394778047. The reversal of 394778046 is 640877493.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 394777986 and 394778004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394778047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1870881 + ... + 1871091.

It is an arithmetic number, because the mean of its divisors is an integer number (9567348).

Almost surely, 2^394778046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394778046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459232704).

394778046 is an abundant number, since it is smaller than the sum of its proper divisors (523687362).

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

394778046 is a wasteful number, since it uses less digits than its factorization.

394778046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 394778046 is about 19869.0222708617. The cubic root of 394778046 is about 733.5859378170.

The spelling of 394778046 in words is "three hundred ninety-four million, seven hundred seventy-eight thousand, forty-six".