383778945 has 32 divisors (see below), whose sum is σ = 744301440. Its totient is φ = 186073920.

The previous prime is 383778937. The next prime is 383778971. The reversal of 383778945 is 549877383.

It is not a de Polignac number, because 383778945 - 2³ = 383778937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 383778891 and 383778900.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127734 + ... + 130703.

It is an arithmetic number, because the mean of its divisors is an integer number (23259420).

Almost surely, 2^383778945 is an apocalyptic number.

It is an amenable number.

383778945 is a deficient number, since it is larger than the sum of its proper divisors (360522495).

383778945 is a wasteful number, since it uses less digits than its factorization.

383778945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258462 (or 258456 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 383778945 is about 19590.2767974319. The cubic root of 383778945 is about 726.7087368913.

The spelling of 383778945 in words is "three hundred eighty-three million, seven hundred seventy-eight thousand, nine hundred forty-five".