1280490890 has 32 divisors (see below), whose sum is σ = 2636492544. Its totient is φ = 438635520.

The previous prime is 1280490829. The next prime is 1280490917. The reversal of 1280490890 is 980940821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77675 + ... + 92705.

It is an arithmetic number, because the mean of its divisors is an integer number (82390392).

Almost surely, 2^1280490890 is an apocalyptic number.

1280490890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1280490890 is an abundant number, since it is smaller than the sum of its proper divisors (1356001654).

1280490890 is a wasteful number, since it uses less digits than its factorization.

1280490890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16262.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 1280490890 is about 35783.9473786781. The cubic root of 1280490890 is about 1085.9058289464.

The spelling of 1280490890 in words is "one billion, two hundred eighty million, four hundred ninety thousand, eight hundred ninety".