1340404650 has 144 divisors (see below), whose sum is σ = 4012477560. Its totient is φ = 318528000.

The previous prime is 1340404631. The next prime is 1340404697. The reversal of 1340404650 is 564040431.

1340404650 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 4 + 0 + 4 + 650 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 35533521 + 1304871129 = 5961^2 + 36123^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 165700 + ... + 173600.

Almost surely, 2^1340404650 is an apocalyptic number.

1340404650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340404650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006238780).

1340404650 is an abundant number, since it is smaller than the sum of its proper divisors (2672072910).

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

1340404650 is a wasteful number, since it uses less digits than its factorization.

1340404650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961 (or 7953 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1340404650 is about 36611.5371160513. The cubic root of 1340404650 is about 1102.5847344133.

The spelling of 1340404650 in words is "one billion, three hundred forty million, four hundred four thousand, six hundred fifty".