78487272 has 32 divisors (see below), whose sum is σ = 218020800. Its totient is φ = 26162352.

The previous prime is 78487187. The next prime is 78487273. The reversal of 78487272 is 27278487.

It is not an unprimeable number, because it can be changed into a prime (78487273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181468 + ... + 181899.

It is an arithmetic number, because the mean of its divisors is an integer number (6813150).

Almost surely, 2^78487272 is an apocalyptic number.

78487272 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78487272 is an abundant number, since it is smaller than the sum of its proper divisors (139533528).

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

78487272 is a wasteful number, since it uses less digits than its factorization.

78487272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363382 (or 363372 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 78487272 is about 8859.3042616224. The cubic root of 78487272 is about 428.1537427699.

The spelling of 78487272 in words is "seventy-eight million, four hundred eighty-seven thousand, two hundred seventy-two".