1201986720 has 144 divisors (see below), whose sum is σ = 4474727712. Its totient is φ = 291386880.

The previous prime is 1201986719. The next prime is 1201986733. The reversal of 1201986720 is 276891021.

1201986720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22102 + ... + 53781.

It is an arithmetic number, because the mean of its divisors is an integer number (31074498).

Almost surely, 2^1201986720 is an apocalyptic number.

1201986720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201986720 is an abundant number, since it is smaller than the sum of its proper divisors (3272740992).

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

1201986720 is a wasteful number, since it uses less digits than its factorization.

1201986720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75915 (or 75904 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1201986720 is about 34669.6801254353. The cubic root of 1201986720 is about 1063.2446916824.

The spelling of 1201986720 in words is "one billion, two hundred one million, nine hundred eighty-six thousand, seven hundred twenty".