1280349450 has 48 divisors (see below), whose sum is σ = 3528077760. Its totient is φ = 341426160.

The previous prime is 1280349439. The next prime is 1280349457. The reversal of 1280349450 is 549430821.

It is not an unprimeable number, because it can be changed into a prime (1280349457) 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 23 ways as a sum of consecutive naturals, for example, 472854 + ... + 475553.

It is an arithmetic number, because the mean of its divisors is an integer number (73501620).

Almost surely, 2^1280349450 is an apocalyptic number.

1280349450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1280349450 is an abundant number, since it is smaller than the sum of its proper divisors (2247728310).

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

1280349450 is a wasteful number, since it uses less digits than its factorization.

1280349450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948428 (or 948417 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1280349450 is about 35781.9710189363. The cubic root of 1280349450 is about 1085.8658452763.

The spelling of 1280349450 in words is "one billion, two hundred eighty million, three hundred forty-nine thousand, four hundred fifty".