1200634983440 has 20 divisors (see below), whose sum is σ = 2791476336684. Its totient is φ = 480253993344.

The previous prime is 1200634983307. The next prime is 1200634983463. The reversal of 1200634983440 is 443894360021.

It can be written as a sum of positive squares in 2 ways, for example, as 196117893904 + 1004517089536 = 442852^2 + 1002256^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1200634983391 and 1200634983400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7503968567 + ... + 7503968726.

Almost surely, 2^{1200634983440} is an apocalyptic number.

1200634983440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200634983440 is an abundant number, since it is smaller than the sum of its proper divisors (1590841353244).

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

1200634983440 is a wasteful number, since it uses less digits than its factorization.

1200634983440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15007937306 (or 15007937300 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 1200634983440 in words is "one trillion, two hundred billion, six hundred thirty-four million, nine hundred eighty-three thousand, four hundred forty".