1019789650 has 24 divisors (see below), whose sum is σ = 2069247024. Its totient is φ = 370832400.

The previous prime is 1019789599. The next prime is 1019789731. The reversal of 1019789650 is 569879101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1019789650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 926532 + ... + 927631.

It is an arithmetic number, because the mean of its divisors is an integer number (86218626).

Almost surely, 2^1019789650 is an apocalyptic number.

1019789650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1019789650 is an abundant number, since it is smaller than the sum of its proper divisors (1049457374).

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

1019789650 is a wasteful number, since it uses less digits than its factorization.

1019789650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854186 (or 1854181 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 1019789650 is about 31934.1455185511. The cubic root of 1019789650 is about 1006.5535077156.

It can be divided in two parts, 101978 and 9650, that added together give a triangular number (111628 = T₄₇₂).

The spelling of 1019789650 in words is "one billion, nineteen million, seven hundred eighty-nine thousand, six hundred fifty".