78122242 has 32 divisors (see below), whose sum is σ = 136935360. Its totient is φ = 33031680.

The previous prime is 78122227. The next prime is 78122249. The reversal of 78122242 is 24222187.

It is a super-2 number, since 2×78122242² = 12206169390213128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78122242.

It is not an unprimeable number, because it can be changed into a prime (78122249) 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, 32113 + ... + 34459.

It is an arithmetic number, because the mean of its divisors is an integer number (4279230).

Almost surely, 2^78122242 is an apocalyptic number.

78122242 is a deficient number, since it is larger than the sum of its proper divisors (58813118).

78122242 is a wasteful number, since it uses less digits than its factorization.

78122242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466.

The product of its digits is 3584, while the sum is 28.

The square root of 78122242 is about 8838.6787474147. The cubic root of 78122242 is about 427.4889560887.

The spelling of 78122242 in words is "seventy-eight million, one hundred twenty-two thousand, two hundred forty-two".