394729400 has 96 divisors (see below), whose sum is σ = 995665440. Its totient is φ = 144668160.

The previous prime is 394729373. The next prime is 394729421. The reversal of 394729400 is 4927493.

It is a super-2 number, since 2×394729400² = 311622598448720000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407717 + ... + 408683.

It is an arithmetic number, because the mean of its divisors is an integer number (10371515).

Almost surely, 2^394729400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394729400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497832720).

394729400 is an abundant number, since it is smaller than the sum of its proper divisors (600936040).

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

394729400 is a wasteful number, since it uses less digits than its factorization.

394729400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 394729400 is about 19867.7980662176. The cubic root of 394729400 is about 733.5558048619. Note that the first 3 decimals are identical.

The spelling of 394729400 in words is "three hundred ninety-four million, seven hundred twenty-nine thousand, four hundred".