78222260 has 24 divisors (see below), whose sum is σ = 168275016. Its totient is φ = 30525440.

The previous prime is 78222257. The next prime is 78222281. The reversal of 78222260 is 6222287.

It can be written as a sum of positive squares in 4 ways, for example, as 9597604 + 68624656 = 3098^2 + 8284^2 .

It is a super-2 number, since 2×78222260² = 12237443919015200, which contains 22 as substring.

It is a congruent number.

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, 46877 + ... + 48516.

It is an arithmetic number, because the mean of its divisors is an integer number (7011459).

Almost surely, 2^78222260 is an apocalyptic number.

It is an amenable number.

78222260 is an abundant number, since it is smaller than the sum of its proper divisors (90052756).

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

78222260 is a wasteful number, since it uses less digits than its factorization.

78222260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95443 (or 95441 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 78222260 is about 8844.3349099862. The cubic root of 78222260 is about 427.6713128480.

The spelling of 78222260 in words is "seventy-eight million, two hundred twenty-two thousand, two hundred sixty".