1278433272 has 32 divisors (see below), whose sum is σ = 3205158480. Its totient is φ = 424934400.

The previous prime is 1278433243. The next prime is 1278433283. The reversal of 1278433272 is 2723348721.

It is a super-4 number, since 4×1278433272⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1278433272.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66979 + ... + 83922.

Almost surely, 2^1278433272 is an apocalyptic number.

1278433272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1278433272 is an abundant number, since it is smaller than the sum of its proper divisors (1926725208).

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

1278433272 is a wasteful number, since it uses less digits than its factorization.

1278433272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151263 (or 151259 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 1278433272 is about 35755.1852463387. The cubic root of 1278433272 is about 1085.3238705549.

It can be divided in two parts, 12784 and 33272, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 1278433272 in words is "one billion, two hundred seventy-eight million, four hundred thirty-three thousand, two hundred seventy-two".