403940825 has 48 divisors (see below), whose sum is σ = 549607680. Its totient is φ = 293329920.

The previous prime is 403940821. The next prime is 403940833. The reversal of 403940825 is 528049304.

It is not a de Polignac number, because 403940825 - 2² = 403940821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (403940821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1779362 + ... + 1779588.

It is an arithmetic number, because the mean of its divisors is an integer number (11450160).

Almost surely, 2^403940825 is an apocalyptic number.

It is an amenable number.

403940825 is a deficient number, since it is larger than the sum of its proper divisors (145666855).

403940825 is a wasteful number, since it uses less digits than its factorization.

403940825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 403940825 is about 20098.2791551914. The cubic root of 403940825 is about 739.2180838726.

The spelling of 403940825 in words is "four hundred three million, nine hundred forty thousand, eight hundred twenty-five".