78458226 has 32 divisors (see below), whose sum is σ = 195637248. Its totient is φ = 20378640.

The previous prime is 78458209. The next prime is 78458227. The reversal of 78458226 is 62285487.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 84450 + ... + 85373.

It is an arithmetic number, because the mean of its divisors is an integer number (6113664).

Almost surely, 2^78458226 is an apocalyptic number.

78458226 is an abundant number, since it is smaller than the sum of its proper divisors (117179022).

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

78458226 is a wasteful number, since it uses less digits than its factorization.

78458226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169846.

The product of its digits is 215040, while the sum is 42.

The square root of 78458226 is about 8857.6648164175. The cubic root of 78458226 is about 428.1009202433.

The spelling of 78458226 in words is "seventy-eight million, four hundred fifty-eight thousand, two hundred twenty-six".