1916769780 has 72 divisors (see below), whose sum is σ = 6120223200. Its totient is φ = 484235712.

The previous prime is 1916769749. The next prime is 1916769781. The reversal of 1916769780 is 879676191.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916769781) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 276810 + ... + 283649.

It is an arithmetic number, because the mean of its divisors is an integer number (85003100).

Almost surely, 2^1916769780 is an apocalyptic number.

1916769780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1916769780 is an abundant number, since it is smaller than the sum of its proper divisors (4203453420).

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

1916769780 is a wasteful number, since it uses less digits than its factorization.

1916769780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560493 (or 560488 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 1916769780 is about 43780.9294099611. The cubic root of 1916769780 is about 1242.1955941421.

The spelling of 1916769780 in words is "one billion, nine hundred sixteen million, seven hundred sixty-nine thousand, seven hundred eighty".