78120227 has 6 divisors (see below), whose sum is σ = 78479388. Its totient is φ = 77762352.

The previous prime is 78120197. The next prime is 78120233. The reversal of 78120227 is 72202187.

It is not a de Polignac number, because 78120227 - 2¹² = 78116131 is a prime.

It is a super-2 number, since 2×78120227² = 12205539733063058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78120227.

It is not an unprimeable number, because it can be changed into a prime (78120827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167048 + ... + 167514.

It is an arithmetic number, because the mean of its divisors is an integer number (13079898).

Almost surely, 2^78120227 is an apocalyptic number.

78120227 is a deficient number, since it is larger than the sum of its proper divisors (359161).

78120227 is an frugal number, since it uses more digits than its factorization.

78120227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 78120227 is about 8838.5647590545. The cubic root of 78120227 is about 427.4852806623.

The spelling of 78120227 in words is "seventy-eight million, one hundred twenty thousand, two hundred twenty-seven".