78208842 has 16 divisors (see below), whose sum is σ = 158561280. Its totient is φ = 25712352.

The previous prime is 78208783. The next prime is 78208849. The reversal of 78208842 is 24880287.

It is a super-2 number, since 2×78208842² = 12233245933961928, 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 78208842.

It is not an unprimeable number, because it can be changed into a prime (78208849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88842 + ... + 89717.

It is an arithmetic number, because the mean of its divisors is an integer number (9910080).

Almost surely, 2^78208842 is an apocalyptic number.

78208842 is an abundant number, since it is smaller than the sum of its proper divisors (80352438).

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

78208842 is a wasteful number, since it uses less digits than its factorization.

78208842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178637.

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 78208842 is about 8843.5763127821. The cubic root of 78208842 is about 427.6468576532.

The spelling of 78208842 in words is "seventy-eight million, two hundred eight thousand, eight hundred forty-two".