1919830680 has 128 divisors (see below), whose sum is σ = 6736320000. Its totient is φ = 485004672.

The previous prime is 1919830657. The next prime is 1919830681. The reversal of 1919830680 is 860389191.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919830681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26260 + ... + 67299.

It is an arithmetic number, because the mean of its divisors is an integer number (52627500).

Almost surely, 2^1919830680 is an apocalyptic number.

1919830680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919830680 is an abundant number, since it is smaller than the sum of its proper divisors (4816489320).

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

1919830680 is a wasteful number, since it uses less digits than its factorization.

1919830680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93598 (or 93588 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1919830680 is about 43815.8724664932. The cubic root of 1919830680 is about 1242.8564654319.

The spelling of 1919830680 in words is "one billion, nine hundred nineteen million, eight hundred thirty thousand, six hundred eighty".