1449223680 has 80 divisors (see below), whose sum is σ = 4633011504. Its totient is φ = 386457600.

The previous prime is 1449223661. The next prime is 1449223687. The reversal of 1449223680 is 863229441.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1449223687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86671 + ... + 102030.

Almost surely, 2^1449223680 is an apocalyptic number.

1449223680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1449223680 is an abundant number, since it is smaller than the sum of its proper divisors (3183787824).

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

1449223680 is an equidigital number, since it uses as much as digits as its factorization.

1449223680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188727 (or 188711 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1449223680 is about 38068.6705835652. The cubic root of 1449223680 is about 1131.6491647951.

The spelling of 1449223680 in words is "one billion, four hundred forty-nine million, two hundred twenty-three thousand, six hundred eighty".