394061540 has 12 divisors (see below), whose sum is σ = 827529276. Its totient is φ = 157624608.

The previous prime is 394061477. The next prime is 394061543. The reversal of 394061540 is 45160493.

It can be written as a sum of positive squares in 2 ways, for example, as 164660224 + 229401316 = 12832^2 + 15146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 394061497 and 394061506.

It is not an unprimeable number, because it can be changed into a prime (394061543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9851519 + ... + 9851558.

It is an arithmetic number, because the mean of its divisors is an integer number (68960773).

Almost surely, 2^394061540 is an apocalyptic number.

It is an amenable number.

394061540 is an abundant number, since it is smaller than the sum of its proper divisors (433467736).

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

394061540 is a wasteful number, since it uses less digits than its factorization.

394061540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19703086 (or 19703084 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 394061540 is about 19850.9833509577. The cubic root of 394061540 is about 733.1418595605.

The spelling of 394061540 in words is "three hundred ninety-four million, sixty-one thousand, five hundred forty".