78249422 has 8 divisors (see below), whose sum is σ = 120103896. Its totient is φ = 38214792.

The previous prime is 78249401. The next prime is 78249433. The reversal of 78249422 is 22494287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78249422² = 12245944086668168, 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454853 + ... + 455024.

It is an arithmetic number, because the mean of its divisors is an integer number (15012987).

Almost surely, 2^78249422 is an apocalyptic number.

78249422 is a deficient number, since it is larger than the sum of its proper divisors (41854474).

78249422 is a wasteful number, since it uses less digits than its factorization.

78249422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909922.

The product of its digits is 64512, while the sum is 38.

The square root of 78249422 is about 8845.8703359251. The cubic root of 78249422 is about 427.7208088350.

The spelling of 78249422 in words is "seventy-eight million, two hundred forty-nine thousand, four hundred twenty-two".