1280457700 has 36 divisors (see below), whose sum is σ = 2781665712. Its totient is φ = 511616800.

The previous prime is 1280457691. The next prime is 1280457701. The reversal of 1280457700 is 77540821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1280457701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90507 + ... + 103693.

It is an arithmetic number, because the mean of its divisors is an integer number (77268492).

Almost surely, 2^1280457700 is an apocalyptic number.

1280457700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280457700 is an abundant number, since it is smaller than the sum of its proper divisors (1501208012).

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

1280457700 is a wasteful number, since it uses less digits than its factorization.

1280457700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14172 (or 14165 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 1280457700 is about 35783.4836202402. The cubic root of 1280457700 is about 1085.8964467305.

The spelling of 1280457700 in words is "one billion, two hundred eighty million, four hundred fifty-seven thousand, seven hundred".