663430938 has 32 divisors (see below), whose sum is σ = 1376835072. Its totient is φ = 212889600.

The previous prime is 663430927. The next prime is 663430949. The reversal of 663430938 is 839034366.

663430938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (663430927) and next prime (663430949).

It is a self number, because there is not a number n which added to its sum of digits gives 663430938.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26658 + ... + 45138.

It is an arithmetic number, because the mean of its divisors is an integer number (43026096).

Almost surely, 2^663430938 is an apocalyptic number.

663430938 is an abundant number, since it is smaller than the sum of its proper divisors (713404134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663430938 is a wasteful number, since it uses less digits than its factorization.

663430938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18710.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 663430938 is about 25757.1531423797. The cubic root of 663430938 is about 872.1648372907.

The spelling of 663430938 in words is "six hundred sixty-three million, four hundred thirty thousand, nine hundred thirty-eight".