120209780 has 12 divisors (see below), whose sum is σ = 252440580. Its totient is φ = 48083904.

The previous prime is 120209767. The next prime is 120209783. The reversal of 120209780 is 87902021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43507216 + 76702564 = 6596^2 + 8758^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120209783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3005225 + ... + 3005264.

It is an arithmetic number, because the mean of its divisors is an integer number (21036715).

Almost surely, 2^120209780 is an apocalyptic number.

120209780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120209780 is an abundant number, since it is smaller than the sum of its proper divisors (132230800).

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

120209780 is a wasteful number, since it uses less digits than its factorization.

120209780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010498 (or 6010496 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 120209780 is about 10964.0220722142. The cubic root of 120209780 is about 493.5296708567.

The spelling of 120209780 in words is "one hundred twenty million, two hundred nine thousand, seven hundred eighty".