78222126 has 32 divisors (see below), whose sum is σ = 171843840. Its totient is φ = 23626944.

The previous prime is 78222121. The next prime is 78222127. The reversal of 78222126 is 62122287.

It is a super-2 number, since 2×78222126² = 12237401991919752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78222093 and 78222102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78222121) 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 15 ways as a sum of consecutive naturals, for example, 12295 + ... + 17538.

It is an arithmetic number, because the mean of its divisors is an integer number (5370120).

Almost surely, 2^78222126 is an apocalyptic number.

78222126 is an abundant number, since it is smaller than the sum of its proper divisors (93621714).

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

78222126 is a wasteful number, since it uses less digits than its factorization.

78222126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29880.

The product of its digits is 5376, while the sum is 30.

The square root of 78222126 is about 8844.3273345122. The cubic root of 78222126 is about 427.6710686380.

The spelling of 78222126 in words is "seventy-eight million, two hundred twenty-two thousand, one hundred twenty-six".