1444780520 has 32 divisors (see below), whose sum is σ = 3421850400. Its totient is φ = 547495488.

The previous prime is 1444780507. The next prime is 1444780523. The reversal of 1444780520 is 250874441.

It is not an unprimeable number, because it can be changed into a prime (1444780523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949754 + ... + 951273.

It is an arithmetic number, because the mean of its divisors is an integer number (106932825).

Almost surely, 2^1444780520 is an apocalyptic number.

1444780520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444780520 is an abundant number, since it is smaller than the sum of its proper divisors (1977069880).

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

1444780520 is a wasteful number, since it uses less digits than its factorization.

1444780520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901057 (or 1901053 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 1444780520 is about 38010.2686125736. The cubic root of 1444780520 is about 1130.4914770219.

The spelling of 1444780520 in words is "one billion, four hundred forty-four million, seven hundred eighty thousand, five hundred twenty".