1442273280 has 384 divisors, whose sum is σ = 5566579200. Its totient is φ = 311427072.

The previous prime is 1442273267. The next prime is 1442273281. The reversal of 1442273280 is 823722441.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442273281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4085584 + ... + 4085936.

It is an arithmetic number, because the mean of its divisors is an integer number (14496300).

Almost surely, 2^1442273280 is an apocalyptic number.

1442273280 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 1442273280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2783289600).

1442273280 is an abundant number, since it is smaller than the sum of its proper divisors (4124305920).

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

1442273280 is a wasteful number, since it uses less digits than its factorization.

1442273280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 1442273280 is about 37977.2732038518. The cubic root of 1442273280 is about 1129.8371551170.

The spelling of 1442273280 in words is "one billion, four hundred forty-two million, two hundred seventy-three thousand, two hundred eighty".