1920140892 has 18 divisors (see below), whose sum is σ = 4853689568. Its totient is φ = 640046952.

The previous prime is 1920140801. The next prime is 1920140897. The reversal of 1920140892 is 2980410291.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 53337247 = 1920140892 / (1 + 9 + 2 + 0 + 1 + 4 + 0 + 8 + 9 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920140897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26668588 + ... + 26668659.

Almost surely, 2^1920140892 is an apocalyptic number.

1920140892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1920140892 is an abundant number, since it is smaller than the sum of its proper divisors (2933548676).

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

1920140892 is a wasteful number, since it uses less digits than its factorization.

1920140892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53337257 (or 53337252 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1920140892 is about 43819.4122735575. The cubic root of 1920140892 is about 1242.9234033186.

The spelling of 1920140892 in words is "one billion, nine hundred twenty million, one hundred forty thousand, eight hundred ninety-two".