1200049640 has 16 divisors (see below), whose sum is σ = 2700111780. Its totient is φ = 480019840.

The previous prime is 1200049639. The next prime is 1200049651. The reversal of 1200049640 is 469400021.

It can be written as a sum of positive squares in 2 ways, for example, as 1147718884 + 52330756 = 33878^2 + 7234^2 .

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, 15000581 + ... + 15000660.

Almost surely, 2^1200049640 is an apocalyptic number.

1200049640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200049640 is an abundant number, since it is smaller than the sum of its proper divisors (1500062140).

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

1200049640 is a wasteful number, since it uses less digits than its factorization.

1200049640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30001252 (or 30001248 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1200049640 is about 34641.7326356520. The cubic root of 1200049640 is about 1062.6732218615.

Adding to 1200049640 its reverse (469400021), we get a palindrome (1669449661).

The spelling of 1200049640 in words is "one billion, two hundred million, forty-nine thousand, six hundred forty".