1989678532 has 6 divisors (see below), whose sum is σ = 3481937438. Its totient is φ = 994839264.

The previous prime is 1989678517. The next prime is 1989678553. The reversal of 1989678532 is 2358769891.

It can be written as a sum of positive squares in only one way, i.e., 1209370176 + 780308356 = 34776^2 + 27934^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248709813 + ... + 248709820.

Almost surely, 2^1989678532 is an apocalyptic number.

It is an amenable number.

1989678532 is a deficient number, since it is larger than the sum of its proper divisors (1492258906).

1989678532 is a wasteful number, since it uses less digits than its factorization.

1989678532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497419637 (or 497419635 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The square root of 1989678532 is about 44605.8127602222. The cubic root of 1989678532 is about 1257.7499382909.

The spelling of 1989678532 in words is "one billion, nine hundred eighty-nine million, six hundred seventy-eight thousand, five hundred thirty-two".