394651140 has 192 divisors, whose sum is σ = 1253145600. Its totient is φ = 92123136.

The previous prime is 394651123. The next prime is 394651171. The reversal of 394651140 is 41156493.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1651141 + ... + 1651379.

It is an arithmetic number, because the mean of its divisors is an integer number (6526800).

Almost surely, 2^394651140 is an apocalyptic number.

394651140 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 394651140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626572800).

394651140 is an abundant number, since it is smaller than the sum of its proper divisors (858494460).

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

394651140 is a wasteful number, since it uses less digits than its factorization.

394651140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 394651140 is about 19865.8284498784. The cubic root of 394651140 is about 733.5073228118.

The spelling of 394651140 in words is "three hundred ninety-four million, six hundred fifty-one thousand, one hundred forty".