78025278 has 16 divisors (see below), whose sum is σ = 156562560. Its totient is φ = 25923096.

The previous prime is 78025253. The next prime is 78025279. The reversal of 78025278 is 87252087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78025279) by changing a digit.

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, 19338 + ... + 23021.

It is an arithmetic number, because the mean of its divisors is an integer number (9785160).

Almost surely, 2^78025278 is an apocalyptic number.

78025278 is an abundant number, since it is smaller than the sum of its proper divisors (78537282).

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

78025278 is a wasteful number, since it uses less digits than its factorization.

78025278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42671.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 78025278 is about 8833.1918353447. The cubic root of 78025278 is about 427.3120188540.

The spelling of 78025278 in words is "seventy-eight million, twenty-five thousand, two hundred seventy-eight".