1280362420 has 12 divisors (see below), whose sum is σ = 2688761124. Its totient is φ = 512144960.

The previous prime is 1280362397. The next prime is 1280362439. The reversal of 1280362420 is 242630821.

It can be written as a sum of positive squares in 2 ways, for example, as 812592036 + 467770384 = 28506^2 + 21628^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32009041 + ... + 32009080.

It is an arithmetic number, because the mean of its divisors is an integer number (224063427).

Almost surely, 2^1280362420 is an apocalyptic number.

1280362420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280362420 is an abundant number, since it is smaller than the sum of its proper divisors (1408398704).

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

1280362420 is a wasteful number, since it uses less digits than its factorization.

1280362420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64018130 (or 64018128 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1280362420 is about 35782.1522550000. The cubic root of 1280362420 is about 1085.8695118879.

The spelling of 1280362420 in words is "one billion, two hundred eighty million, three hundred sixty-two thousand, four hundred twenty".