78266272 has 24 divisors (see below), whose sum is σ = 176099616. Its totient is φ = 33542592.

The previous prime is 78266269. The next prime is 78266281. The reversal of 78266272 is 27266287.

It is a super-2 number, since 2×78266272² = 12251218665555968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 174478 + ... + 174925.

It is an arithmetic number, because the mean of its divisors is an integer number (7337484).

Almost surely, 2^78266272 is an apocalyptic number.

It is an amenable number.

78266272 is an abundant number, since it is smaller than the sum of its proper divisors (97833344).

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

78266272 is a wasteful number, since it uses less digits than its factorization.

78266272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349420 (or 349412 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 78266272 is about 8846.8227064862. The cubic root of 78266272 is about 427.7515080112.

The spelling of 78266272 in words is "seventy-eight million, two hundred sixty-six thousand, two hundred seventy-two".