1021768980 has 48 divisors (see below), whose sum is σ = 2914942464. Its totient is φ = 267329920.

The previous prime is 1021768963. The next prime is 1021768981. The reversal of 1021768980 is 898671201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021768981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157476 + ... + 163835.

It is an arithmetic number, because the mean of its divisors is an integer number (60727968).

Almost surely, 2^1021768980 is an apocalyptic number.

1021768980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021768980 is an abundant number, since it is smaller than the sum of its proper divisors (1893173484).

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

1021768980 is a wasteful number, since it uses less digits than its factorization.

1021768980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321376 (or 321374 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 1021768980 is about 31965.1213043217. The cubic root of 1021768980 is about 1007.2043000879.

It can be divided in two parts, 102176 and 8980, that added together give a triangular number (111156 = T₄₇₁).

The spelling of 1021768980 in words is "one billion, twenty-one million, seven hundred sixty-eight thousand, nine hundred eighty".