1989465700 has 18 divisors (see below), whose sum is σ = 4317140786. Its totient is φ = 795786240.

The previous prime is 1989465677. The next prime is 1989465713. The reversal of 1989465700 is 75649891.

It can be written as a sum of positive squares in 3 ways, for example, as 17572864 + 1971892836 = 4192^2 + 44406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9947229 + ... + 9947428.

Almost surely, 2^1989465700 is an apocalyptic number.

1989465700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1989465700 is an abundant number, since it is smaller than the sum of its proper divisors (2327675086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1989465700 is a wasteful number, since it uses less digits than its factorization.

1989465700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19894671 (or 19894664 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1989465700 is about 44603.4269983821. The cubic root of 1989465700 is about 1257.7050903459.

The spelling of 1989465700 in words is "one billion, nine hundred eighty-nine million, four hundred sixty-five thousand, seven hundred".