403838820945 has 24 divisors (see below), whose sum is σ = 799985474496. Its totient is φ = 184612032288.

The previous prime is 403838820901. The next prime is 403838820947. The reversal of 403838820945 is 549028838304.

It is not a de Polignac number, because 403838820945 - 2⁹ = 403838820433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 403838820891 and 403838820900.

It is not an unprimeable number, because it can be changed into a prime (403838820947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 641013687 + ... + 641014316.

It is an arithmetic number, because the mean of its divisors is an integer number (33332728104).

Almost surely, 2^403838820945 is an apocalyptic number.

403838820945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

403838820945 is a deficient number, since it is larger than the sum of its proper divisors (396146653551).

403838820945 is a wasteful number, since it uses less digits than its factorization.

403838820945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282028021 (or 1282028018 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 403838820945 in words is "four hundred three billion, eight hundred thirty-eight million, eight hundred twenty thousand, nine hundred forty-five".