78458228 has 12 divisors (see below), whose sum is σ = 140223552. Its totient is φ = 38394360.

The previous prime is 78458227. The next prime is 78458231. The reversal of 78458228 is 82285487.

78458228 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

78458228 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78458227) 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, 208478 + ... + 208853.

It is an arithmetic number, because the mean of its divisors is an integer number (11685296).

Almost surely, 2^78458228 is an apocalyptic number.

It is an amenable number.

78458228 is a deficient number, since it is larger than the sum of its proper divisors (61765324).

78458228 is a wasteful number, since it uses less digits than its factorization.

78458228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417382 (or 417380 counting only the distinct ones).

The product of its digits is 286720, while the sum is 44.

The square root of 78458228 is about 8857.6649293140. The cubic root of 78458228 is about 428.1009238809.

The spelling of 78458228 in words is "seventy-eight million, four hundred fifty-eight thousand, two hundred twenty-eight".