394834140 has 36 divisors (see below), whose sum is σ = 1197664104. Its totient is φ = 105289056.

The previous prime is 394834133. The next prime is 394834199. The reversal of 394834140 is 41438493.

394834140 is a `hidden beast` number, since 39 + 483 + 4 + 140 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 394834095 and 394834104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1096582 + ... + 1096941.

Almost surely, 2^394834140 is an apocalyptic number.

394834140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394834140 is an abundant number, since it is smaller than the sum of its proper divisors (802829964).

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

394834140 is a wasteful number, since it uses less digits than its factorization.

394834140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193538 (or 2193533 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 394834140 is about 19870.4338150932. The cubic root of 394834140 is about 733.6206812390.

The spelling of 394834140 in words is "three hundred ninety-four million, eight hundred thirty-four thousand, one hundred forty".