1989970092 has 120 divisors (see below), whose sum is σ = 5973992640. Its totient is φ = 571263840.

The previous prime is 1989970091. The next prime is 1989970093. The reversal of 1989970092 is 2900799891.

It is an interprime number because it is at equal distance from previous prime (1989970091) and next prime (1989970093).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1989970091) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53023 + ... + 82409.

It is an arithmetic number, because the mean of its divisors is an integer number (49783272).

Almost surely, 2^1989970092 is an apocalyptic number.

1989970092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989970092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2986996320).

1989970092 is an abundant number, since it is smaller than the sum of its proper divisors (3984022548).

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

1989970092 is a wasteful number, since it uses less digits than its factorization.

1989970092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29433 (or 29422 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 1989970092 is about 44609.0808244241. The cubic root of 1989970092 is about 1257.8113706036.

The spelling of 1989970092 in words is "one billion, nine hundred eighty-nine million, nine hundred seventy thousand, ninety-two".