78228834 has 16 divisors (see below), whose sum is σ = 161853120. Its totient is φ = 25177040.

The previous prime is 78228827. The next prime is 78228853. The reversal of 78228834 is 43882287.

It is a super-2 number, since 2×78228834² = 12239500937999112, which contains 22 as substring.

It is an unprimeable number.

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, 224622 + ... + 224969.

It is an arithmetic number, because the mean of its divisors is an integer number (10115820).

Almost surely, 2^78228834 is an apocalyptic number.

78228834 is an abundant number, since it is smaller than the sum of its proper divisors (83624286).

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

78228834 is a wasteful number, since it uses less digits than its factorization.

78228834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449625.

The product of its digits is 172032, while the sum is 42.

The square root of 78228834 is about 8844.7065525092. The cubic root of 78228834 is about 427.6832933783.

The spelling of 78228834 in words is "seventy-eight million, two hundred twenty-eight thousand, eight hundred thirty-four".