78028252 has 12 divisors (see below), whose sum is σ = 137826360. Its totient is φ = 38649296.

The previous prime is 78028229. The next prime is 78028253. The reversal of 78028252 is 25282087.

It is a super-2 number, since 2×78028252² = 12176816220351008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78028253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90727 + ... + 91582.

It is an arithmetic number, because the mean of its divisors is an integer number (11485530).

Almost surely, 2^78028252 is an apocalyptic number.

It is an amenable number.

78028252 is a deficient number, since it is larger than the sum of its proper divisors (59798108).

78028252 is a wasteful number, since it uses less digits than its factorization.

78028252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182420 (or 182418 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 78028252 is about 8833.3601760598. The cubic root of 78028252 is about 427.3174479057.

The spelling of 78028252 in words is "seventy-eight million, twenty-eight thousand, two hundred fifty-two".