1273368320 has 288 divisors, whose sum is σ = 3758082048. Its totient is φ = 403881984.

The previous prime is 1273368263. The next prime is 1273368329. The reversal of 1273368320 is 238633721.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273368329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7624877 + ... + 7625043.

It is an arithmetic number, because the mean of its divisors is an integer number (13048896).

Almost surely, 2^1273368320 is an apocalyptic number.

1273368320 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 1273368320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879041024).

1273368320 is an abundant number, since it is smaller than the sum of its proper divisors (2484713728).

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

1273368320 is a wasteful number, since it uses less digits than its factorization.

1273368320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 1273368320 is about 35684.2867380028. The cubic root of 1273368320 is about 1083.8886792634. Note that the first 3 decimals are identical.

The spelling of 1273368320 in words is "one billion, two hundred seventy-three million, three hundred sixty-eight thousand, three hundred twenty".