78227372200 has 24 divisors (see below), whose sum is σ = 181878640830. Its totient is φ = 31290948800.

The previous prime is 78227372191. The next prime is 78227372207. The reversal of 78227372200 is 227372287.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 75802203684 + 2425168516 = 275322^2 + 49246^2 .

It is a super-2 number, since 2×78227372200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (78227372207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195568231 + ... + 195568630.

Almost surely, 2^78227372200 is an apocalyptic number.

It is an amenable number.

78227372200 is an abundant number, since it is smaller than the sum of its proper divisors (103651268630).

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

78227372200 is a wasteful number, since it uses less digits than its factorization.

78227372200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391136877 (or 391136868 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 78227372200 in words is "seventy-eight billion, two hundred twenty-seven million, three hundred seventy-two thousand, two hundred".