1200640368 has 160 divisors (see below), whose sum is σ = 3435048000. Its totient is φ = 359661568.

The previous prime is 1200640327. The next prime is 1200640391. The reversal of 1200640368 is 8630460021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2673808 + ... + 2674256.

It is an arithmetic number, because the mean of its divisors is an integer number (21469050).

Almost surely, 2^1200640368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200640368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717524000).

1200640368 is an abundant number, since it is smaller than the sum of its proper divisors (2234407632).

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

1200640368 is a wasteful number, since it uses less digits than its factorization.

1200640368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1200640368 is about 34650.2578345385. The cubic root of 1200640368 is about 1062.8475612750.

The spelling of 1200640368 in words is "one billion, two hundred million, six hundred forty thousand, three hundred sixty-eight".