1949782120 has 128 divisors (see below), whose sum is σ = 5227649280. Its totient is φ = 645120000.

The previous prime is 1949782111. The next prime is 1949782127. The reversal of 1949782120 is 212879491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1949782127) 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, 403720 + ... + 408520.

It is an arithmetic number, because the mean of its divisors is an integer number (40841010).

Almost surely, 2^1949782120 is an apocalyptic number.

1949782120 is a gapful number since it is divisible by the number (10) 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 1949782120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2613824640).

1949782120 is an abundant number, since it is smaller than the sum of its proper divisors (3277867160).

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

1949782120 is a wasteful number, since it uses less digits than its factorization.

1949782120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1949782120 is about 44156.3372575217. The cubic root of 1949782120 is about 1249.2864450156.

The spelling of 1949782120 in words is "one billion, nine hundred forty-nine million, seven hundred eighty-two thousand, one hundred twenty".