1268564278 has 8 divisors (see below), whose sum is σ = 1911156480. Its totient is φ = 631512120.

The previous prime is 1268564257. The next prime is 1268564359. The reversal of 1268564278 is 8724658621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1268564278² = 3218510654835322568, which contains 22 as substring.

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, 1384438 + ... + 1385353.

It is an arithmetic number, because the mean of its divisors is an integer number (238894560).

Almost surely, 2^1268564278 is an apocalyptic number.

1268564278 is a deficient number, since it is larger than the sum of its proper divisors (642592202).

1268564278 is a wasteful number, since it uses less digits than its factorization.

1268564278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770022.

The product of its digits is 1290240, while the sum is 49.

The square root of 1268564278 is about 35616.9100007286. The cubic root of 1268564278 is about 1082.5238977278.

The spelling of 1268564278 in words is "one billion, two hundred sixty-eight million, five hundred sixty-four thousand, two hundred seventy-eight".