1988307994 has 8 divisors (see below), whose sum is σ = 3018395520. Its totient is φ = 982176156.

The previous prime is 1988307967. The next prime is 1988308009. The reversal of 1988307994 is 4997038891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5988714 + ... + 5989045.

It is an arithmetic number, because the mean of its divisors is an integer number (377299440).

Almost surely, 2^1988307994 is an apocalyptic number.

1988307994 is a deficient number, since it is larger than the sum of its proper divisors (1030087526).

1988307994 is a wasteful number, since it uses less digits than its factorization.

1988307994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11977844.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 1988307994 is about 44590.4473402095. The cubic root of 1988307994 is about 1257.4610825778.

The spelling of 1988307994 in words is "one billion, nine hundred eighty-eight million, three hundred seven thousand, nine hundred ninety-four".