1280348838 has 24 divisors (see below), whose sum is σ = 2805262200. Its totient is φ = 421987104.

The previous prime is 1280348833. The next prime is 1280348903. The reversal of 1280348838 is 8388430821.

It is a junction number, because it is equal to n+sod(n) for n = 1280348793 and 1280348802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280348831) 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, 398008 + ... + 401211.

It is an arithmetic number, because the mean of its divisors is an integer number (116885925).

Almost surely, 2^1280348838 is an apocalyptic number.

1280348838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1280348838 is an abundant number, since it is smaller than the sum of its proper divisors (1524913362).

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

1280348838 is a wasteful number, since it uses less digits than its factorization.

1280348838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799316 (or 799313 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 1280348838 is about 35781.9624671426. The cubic root of 1280348838 is about 1085.8656722637.

The spelling of 1280348838 in words is "one billion, two hundred eighty million, three hundred forty-eight thousand, eight hundred thirty-eight".