1201370640 has 80 divisors (see below), whose sum is σ = 3740683200. Its totient is φ = 318951936.

The previous prime is 1201370633. The next prime is 1201370669. The reversal of 1201370640 is 460731021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1201370640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44031 + ... + 65889.

It is an arithmetic number, because the mean of its divisors is an integer number (46758540).

Almost surely, 2^1201370640 is an apocalyptic number.

1201370640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201370640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1870341600).

1201370640 is an abundant number, since it is smaller than the sum of its proper divisors (2539312560).

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

1201370640 is a wasteful number, since it uses less digits than its factorization.

1201370640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22104 (or 22098 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1201370640 is about 34660.7939897516. The cubic root of 1201370640 is about 1063.0630047788.

The spelling of 1201370640 in words is "one billion, two hundred one million, three hundred seventy thousand, six hundred forty".