7978278272 has 32 divisors (see below), whose sum is σ = 16585285680. Its totient is φ = 3815696896.

The previous prime is 7978278257. The next prime is 7978278281. The reversal of 7978278272 is 2728728797.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 1352063 + ... + 1357950.

Almost surely, 2^7978278272 is an apocalyptic number.

It is an amenable number.

7978278272 is an abundant number, since it is smaller than the sum of its proper divisors (8607007408).

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

7978278272 is a wasteful number, since it uses less digits than its factorization.

7978278272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710050 (or 2710038 counting only the distinct ones).

The product of its digits is 11063808, while the sum is 59.

The square root of 7978278272 is about 89321.2084109927. The cubic root of 7978278272 is about 1998.1882152136.

The spelling of 7978278272 in words is "seven billion, nine hundred seventy-eight million, two hundred seventy-eight thousand, two hundred seventy-two".