1204307781628 has 12 divisors (see below), whose sum is σ = 2408615563312. Its totient is φ = 516131906400.

The previous prime is 1204307781623. The next prime is 1204307781629. The reversal of 1204307781628 is 8261877034021.

1204307781628 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204307781623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21505496073 + ... + 21505496128.

Almost surely, 2^{1204307781628} is an apocalyptic number.

It is an amenable number.

1204307781628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1204307781628 is a wasteful number, since it uses less digits than its factorization.

1204307781628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43010992212 (or 43010992210 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 1204307781628 in words is "one trillion, two hundred four billion, three hundred seven million, seven hundred eighty-one thousand, six hundred twenty-eight".