663019428 has 48 divisors (see below), whose sum is σ = 1593080384. Its totient is φ = 214462080.

The previous prime is 663019411. The next prime is 663019433. The reversal of 663019428 is 824910366.

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, 185151 + ... + 188697.

Almost surely, 2^663019428 is an apocalyptic number.

It is an amenable number.

663019428 is an abundant number, since it is smaller than the sum of its proper divisors (930060956).

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

663019428 is a wasteful number, since it uses less digits than its factorization.

663019428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012 (or 4010 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 663019428 is about 25749.1636369028. The cubic root of 663019428 is about 871.9844724811.

The spelling of 663019428 in words is "six hundred sixty-three million, nineteen thousand, four hundred twenty-eight".