78291227 has 8 divisors (see below), whose sum is σ = 90345216. Its totient is φ = 66454632.

The previous prime is 78291209. The next prime is 78291247. The reversal of 78291227 is 72219287.

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 78291227 - 2²⁰ = 77242651 is a prime.

It is a super-2 number, since 2×78291227² = 12259032450331058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78291247) 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, 53573 + ... + 55014.

It is an arithmetic number, because the mean of its divisors is an integer number (11293152).

Almost surely, 2^78291227 is an apocalyptic number.

78291227 is a deficient number, since it is larger than the sum of its proper divisors (12053989).

78291227 is a wasteful number, since it uses less digits than its factorization.

78291227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108697.

The product of its digits is 28224, while the sum is 38.

The square root of 78291227 is about 8848.2329874388. The cubic root of 78291227 is about 427.7969656704.

The spelling of 78291227 in words is "seventy-eight million, two hundred ninety-one thousand, two hundred twenty-seven".