1989818074 has 8 divisors (see below), whose sum is σ = 3160299348. Its totient is φ = 936384960.

The previous prime is 1989818063. The next prime is 1989818101. The reversal of 1989818074 is 4708189891.

It can be written as a sum of positive squares in 2 ways, for example, as 1932921225 + 56896849 = 43965^2 + 7543^2 .

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, 29261997 + ... + 29262064.

Almost surely, 2^1989818074 is an apocalyptic number.

1989818074 is a deficient number, since it is larger than the sum of its proper divisors (1170481274).

1989818074 is a wasteful number, since it uses less digits than its factorization.

1989818074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58524080.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The square root of 1989818074 is about 44607.3769011360. The cubic root of 1989818074 is about 1257.7793408361.

The spelling of 1989818074 in words is "one billion, nine hundred eighty-nine million, eight hundred eighteen thousand, seventy-four".