78127228 has 24 divisors (see below), whose sum is σ = 144633888. Its totient is φ = 36850176.

The previous prime is 78127211. The next prime is 78127241. The reversal of 78127228 is 82272187.

It is a happy number.

It is a super-2 number, since 2×78127228² = 12207727509927968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900 + ... + 12532.

It is an arithmetic number, because the mean of its divisors is an integer number (6026412).

Almost surely, 2^78127228 is an apocalyptic number.

It is an amenable number.

78127228 is a deficient number, since it is larger than the sum of its proper divisors (66506660).

78127228 is a wasteful number, since it uses less digits than its factorization.

78127228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11733 (or 11731 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 78127228 is about 8838.9607986460. The cubic root of 78127228 is about 427.4980504454.

The spelling of 78127228 in words is "seventy-eight million, one hundred twenty-seven thousand, two hundred twenty-eight".