78969228 has 24 divisors (see below), whose sum is σ = 198435888. Its totient is φ = 24298176.

The previous prime is 78969227. The next prime is 78969287. The reversal of 78969228 is 82296987.

It is a happy number.

It is a super-2 number, since 2×78969228² = 12472277941831968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78969221) 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, 252951 + ... + 253262.

It is an arithmetic number, because the mean of its divisors is an integer number (8268162).

Almost surely, 2^78969228 is an apocalyptic number.

78969228 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

78969228 is an abundant number, since it is smaller than the sum of its proper divisors (119466660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78969228 is a wasteful number, since it uses less digits than its factorization.

78969228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506233 (or 506231 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 78969228 is about 8886.4631884682. The cubic root of 78969228 is about 429.0283233401.

It can be divided in two parts, 78969 and 228, that added together give a palindrome (79197).

The spelling of 78969228 in words is "seventy-eight million, nine hundred sixty-nine thousand, two hundred twenty-eight".