1298881240 has 16 divisors (see below), whose sum is σ = 2922482880. Its totient is φ = 519552480.

The previous prime is 1298881223. The next prime is 1298881267. The reversal of 1298881240 is 421888921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16235976 + ... + 16236055.

It is an arithmetic number, because the mean of its divisors is an integer number (182655180).

Almost surely, 2^1298881240 is an apocalyptic number.

1298881240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298881240 is an abundant number, since it is smaller than the sum of its proper divisors (1623601640).

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

1298881240 is a wasteful number, since it uses less digits than its factorization.

1298881240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32472042 (or 32472038 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 43.

The square root of 1298881240 is about 36039.9950055490. The cubic root of 1298881240 is about 1091.0797145664.

The spelling of 1298881240 in words is "one billion, two hundred ninety-eight million, eight hundred eighty-one thousand, two hundred forty".