1989041588 has 6 divisors (see below), whose sum is σ = 3480822786. Its totient is φ = 994520792.

The previous prime is 1989041563. The next prime is 1989041591. The reversal of 1989041588 is 8851409891.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1973847184 + 15194404 = 44428^2 + 3898^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248630195 + ... + 248630202.

It is an arithmetic number, because the mean of its divisors is an integer number (580137131).

Almost surely, 2^1989041588 is an apocalyptic number.

It is an amenable number.

1989041588 is a deficient number, since it is larger than the sum of its proper divisors (1491781198).

1989041588 is a wasteful number, since it uses less digits than its factorization.

1989041588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497260401 (or 497260399 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 53.

The square root of 1989041588 is about 44598.6724914543. The cubic root of 1989041588 is about 1257.6157119549.

The spelling of 1989041588 in words is "one billion, nine hundred eighty-nine million, forty-one thousand, five hundred eighty-eight".