78429227 has 8 divisors (see below), whose sum is σ = 80328672. Its totient is φ = 76552000.

The previous prime is 78429223. The next prime is 78429257. The reversal of 78429227 is 72292487.

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

It is a cyclic number.

It is not a de Polignac number, because 78429227 - 2² = 78429223 is a prime.

It is a super-2 number, since 2×78429227² = 12302287295635058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78429223) 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, 1703 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (10041084).

Almost surely, 2^78429227 is an apocalyptic number.

78429227 is a deficient number, since it is larger than the sum of its proper divisors (1899445).

78429227 is a wasteful number, since it uses less digits than its factorization.

78429227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109.

The product of its digits is 112896, while the sum is 41.

The square root of 78429227 is about 8856.0277212755. The cubic root of 78429227 is about 428.0481701832.

The spelling of 78429227 in words is "seventy-eight million, four hundred twenty-nine thousand, two hundred twenty-seven".