1993436608 has 28 divisors (see below), whose sum is σ = 3961866600. Its totient is φ = 995171072.

The previous prime is 1993436603. The next prime is 1993436639. The reversal of 1993436608 is 8066343991.

It is a super-2 number, since 2×1993436608² = 7947579020229091328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993436603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17943 + ... + 65641.

Almost surely, 2^1993436608 is an apocalyptic number.

It is an amenable number.

1993436608 is a deficient number, since it is larger than the sum of its proper divisors (1968429992).

1993436608 is an equidigital number, since it uses as much as digits as its factorization.

1993436608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48364 (or 48354 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 1993436608 is about 44647.9182941377. The cubic root of 1993436608 is about 1258.5413135440.

The spelling of 1993436608 in words is "one billion, nine hundred ninety-three million, four hundred thirty-six thousand, six hundred eight".