2028781764 has 27 divisors (see below), whose sum is σ = 5128992687. Its totient is φ = 676170504.

The previous prime is 2028781757. The next prime is 2028781771. The reversal of 2028781764 is 4671878202.

The square root of 2028781764 is 45042.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (2028781757) and next prime (2028781771).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 266499 + ... + 274005.

Almost surely, 2^2028781764 is an apocalyptic number.

2028781764 is the 45042-nd square number.

It is an amenable number.

2028781764 is an abundant number, since it is smaller than the sum of its proper divisors (3100210923).

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

2028781764 is an frugal number, since it uses more digits than its factorization.

2028781764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15024 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The cubic root of 2028781764 is about 1265.9360793704.

The spelling of 2028781764 in words is "two billion, twenty-eight million, seven hundred eighty-one thousand, seven hundred sixty-four".