1278081284 has 48 divisors (see below), whose sum is σ = 2500243200. Its totient is φ = 568106496.

The previous prime is 1278081263. The next prime is 1278081307. The reversal of 1278081284 is 4821808721.

It is a super-2 number, since 2×1278081284² = 3266983537022177312, which contains 22 as substring.

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, 501317 + ... + 503859.

It is an arithmetic number, because the mean of its divisors is an integer number (52088400).

Almost surely, 2^1278081284 is an apocalyptic number.

It is an amenable number.

1278081284 is a deficient number, since it is larger than the sum of its proper divisors (1222161916).

1278081284 is a wasteful number, since it uses less digits than its factorization.

1278081284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 41.

The square root of 1278081284 is about 35750.2627123214. The cubic root of 1278081284 is about 1085.2242548632.

The spelling of 1278081284 in words is "one billion, two hundred seventy-eight million, eighty-one thousand, two hundred eighty-four".