1278813552 has 40 divisors (see below), whose sum is σ = 3305038464. Its totient is φ = 426085824.

The previous prime is 1278813533. The next prime is 1278813587. The reversal of 1278813552 is 2553188721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147613 + ... + 156035.

Almost surely, 2^1278813552 is an apocalyptic number.

1278813552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1278813552 is an abundant number, since it is smaller than the sum of its proper divisors (2026224912).

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

1278813552 is a wasteful number, since it uses less digits than its factorization.

1278813552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11597 (or 11591 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 1278813552 is about 35760.5026810306. The cubic root of 1278813552 is about 1085.4314725848.

The spelling of 1278813552 in words is "one billion, two hundred seventy-eight million, eight hundred thirteen thousand, five hundred fifty-two".