394440545 has 8 divisors (see below), whose sum is σ = 501171624. Its totient is φ = 296990464.

The previous prime is 394440533. The next prime is 394440577. The reversal of 394440545 is 545044493.

It can be written as a sum of positive squares in 4 ways, for example, as 33744481 + 360696064 = 5809^2 + 18992^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394440545 - 2⁶ = 394440481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394440499 and 394440508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320154 + ... + 2320323.

It is an arithmetic number, because the mean of its divisors is an integer number (62646453).

Almost surely, 2^394440545 is an apocalyptic number.

It is an amenable number.

394440545 is a deficient number, since it is larger than the sum of its proper divisors (106731079).

394440545 is a wasteful number, since it uses less digits than its factorization.

394440545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640499.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 394440545 is about 19860.5273092131. The cubic root of 394440545 is about 733.3768274249.

The spelling of 394440545 in words is "three hundred ninety-four million, four hundred forty thousand, five hundred forty-five".