394868736 has 192 divisors, whose sum is σ = 1207533600. Its totient is φ = 127401984.

The previous prime is 394868729. The next prime is 394868737. The reversal of 394868736 is 637868493.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394868737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2045856 + ... + 2046048.

Almost surely, 2^394868736 is an apocalyptic number.

394868736 is a gapful number since it is divisible by the number (36) 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 394868736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603766800).

394868736 is an abundant number, since it is smaller than the sum of its proper divisors (812664864).

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

394868736 is a wasteful number, since it uses less digits than its factorization.

394868736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 235 counting only the distinct ones).

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

The square root of 394868736 is about 19871.3043356494. The cubic root of 394868736 is about 733.6421076198.

The spelling of 394868736 in words is "three hundred ninety-four million, eight hundred sixty-eight thousand, seven hundred thirty-six".