1989374336 has 16 divisors (see below), whose sum is σ = 3963206940. Its totient is φ = 994687104.

The previous prime is 1989374333. The next prime is 1989374353. The reversal of 1989374336 is 6334739891.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×1989374336² = 7915220497470881792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989374333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770866 + ... + 7771121.

Almost surely, 2^1989374336 is an apocalyptic number.

1989374336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1989374336 is a deficient number, since it is larger than the sum of its proper divisors (1973832604).

1989374336 is an equidigital number, since it uses as much as digits as its factorization.

1989374336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15542001 (or 15541989 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 53.

The square root of 1989374336 is about 44602.4028052301. The cubic root of 1989374336 is about 1257.6858371486.

The spelling of 1989374336 in words is "one billion, nine hundred eighty-nine million, three hundred seventy-four thousand, three hundred thirty-six".