1989798370 has 48 divisors (see below), whose sum is σ = 4385698560. Its totient is φ = 646307424.

The previous prime is 1989798367. The next prime is 1989798397. The reversal of 1989798370 is 738979891.

It is a super-3 number, since 3×1989798370³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1989798299 and 1989798308.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97554 + ... + 116173.

It is an arithmetic number, because the mean of its divisors is an integer number (91368720).

Almost surely, 2^1989798370 is an apocalyptic number.

1989798370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989798370 is an abundant number, since it is smaller than the sum of its proper divisors (2395900190).

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

1989798370 is a wasteful number, since it uses less digits than its factorization.

1989798370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213767 (or 213760 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 61.

The square root of 1989798370 is about 44607.1560402588. The cubic root of 1989798370 is about 1257.7751891390.

The spelling of 1989798370 in words is "one billion, nine hundred eighty-nine million, seven hundred ninety-eight thousand, three hundred seventy".