403499668 has 54 divisors (see below), whose sum is σ = 840620382. Its totient is φ = 169266240.

The previous prime is 403499647. The next prime is 403499671. The reversal of 403499668 is 866994304.

It can be written as a sum of positive squares in 3 ways, for example, as 3579664 + 399920004 = 1892^2 + 19998^2 .

It is a super-2 number, since 2×403499668² = 325623964152220448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 79330 + ... + 84262.

Almost surely, 2^403499668 is an apocalyptic number.

It is an amenable number.

403499668 is an abundant number, since it is smaller than the sum of its proper divisors (437120714).

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

403499668 is a wasteful number, since it uses less digits than its factorization.

403499668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4959 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 403499668 is about 20087.3011626749. The cubic root of 403499668 is about 738.9488777554.

The spelling of 403499668 in words is "four hundred three million, four hundred ninety-nine thousand, six hundred sixty-eight".