1780628812 has 36 divisors (see below), whose sum is σ = 3265730440. Its totient is φ = 849448512.

The previous prime is 1780628779. The next prime is 1780628819. The reversal of 1780628812 is 2188260871.

It is a super-2 number, since 2×1780628812² = 6341277932249062688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1780628819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1105864 + ... + 1107472.

Almost surely, 2^1780628812 is an apocalyptic number.

It is an amenable number.

1780628812 is a deficient number, since it is larger than the sum of its proper divisors (1485101628).

1780628812 is a wasteful number, since it uses less digits than its factorization.

1780628812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182 (or 2157 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 1780628812 is about 42197.4976983233. The cubic root of 1780628812 is about 1212.0609668090.

The spelling of 1780628812 in words is "one billion, seven hundred eighty million, six hundred twenty-eight thousand, eight hundred twelve".