1988306642 has 64 divisors (see below), whose sum is σ = 3746131200. Its totient is φ = 772208640.

The previous prime is 1988306581. The next prime is 1988306647. The reversal of 1988306642 is 2466038891.

It is not an unprimeable number, because it can be changed into a prime (1988306647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870542 + ... + 872822.

It is an arithmetic number, because the mean of its divisors is an integer number (58533300).

Almost surely, 2^1988306642 is an apocalyptic number.

1988306642 is a deficient number, since it is larger than the sum of its proper divisors (1757824558).

1988306642 is a wasteful number, since it uses less digits than its factorization.

1988306642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 1988306642 is about 44590.4321800092. The cubic root of 1988306642 is about 1257.4607975637.

The spelling of 1988306642 in words is "one billion, nine hundred eighty-eight million, three hundred six thousand, six hundred forty-two".