403978771 has 16 divisors (see below), whose sum is σ = 473140224. Its totient is φ = 337731264.

The previous prime is 403978747. The next prime is 403978789. The reversal of 403978771 is 177879304.

It is a cyclic number.

It is not a de Polignac number, because 403978771 - 2¹⁹ = 403454483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403978721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101016 + ... + 104938.

It is an arithmetic number, because the mean of its divisors is an integer number (29571264).

Almost surely, 2^403978771 is an apocalyptic number.

403978771 is a deficient number, since it is larger than the sum of its proper divisors (69161453).

403978771 is a wasteful number, since it uses less digits than its factorization.

403978771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 403978771 is about 20099.2231441914. The cubic root of 403978771 is about 739.2412304075.

The spelling of 403978771 in words is "four hundred three million, nine hundred seventy-eight thousand, seven hundred seventy-one".