1969912780 has 96 divisors (see below), whose sum is σ = 4783403520. Its totient is φ = 673920000.

The previous prime is 1969912751. The next prime is 1969912793. The reversal of 1969912780 is 872199691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629620 + ... + 632740.

It is an arithmetic number, because the mean of its divisors is an integer number (49827120).

Almost surely, 2^1969912780 is an apocalyptic number.

1969912780 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 1969912780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2391701760).

1969912780 is an abundant number, since it is smaller than the sum of its proper divisors (2813490740).

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

1969912780 is a wasteful number, since it uses less digits than its factorization.

1969912780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311 (or 3309 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 1969912780 is about 44383.6994852840. The cubic root of 1969912780 is about 1253.5711806853.

The spelling of 1969912780 in words is "one billion, nine hundred sixty-nine million, nine hundred twelve thousand, seven hundred eighty".