1273303840 has 48 divisors (see below), whose sum is σ = 3026697408. Its totient is φ = 506186496.

The previous prime is 1273303807. The next prime is 1273303873. The reversal of 1273303840 is 483033721.

It is an interprime number because it is at equal distance from previous prime (1273303807) and next prime (1273303873).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1669 + ... + 50491.

It is an arithmetic number, because the mean of its divisors is an integer number (63056196).

Almost surely, 2^1273303840 is an apocalyptic number.

1273303840 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 1273303840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513348704).

1273303840 is an abundant number, since it is smaller than the sum of its proper divisors (1753393568).

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

1273303840 is a wasteful number, since it uses less digits than its factorization.

1273303840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49001 (or 48993 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 1273303840 is about 35683.3832476687. The cubic root of 1273303840 is about 1083.8703838703.

The spelling of 1273303840 in words is "one billion, two hundred seventy-three million, three hundred three thousand, eight hundred forty".