1228638192 has 40 divisors (see below), whose sum is σ = 3341036160. Its totient is φ = 387990720.

The previous prime is 1228638167. The next prime is 1228638199. The reversal of 1228638192 is 2918368221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228638199) 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, 672684 + ... + 674507.

It is an arithmetic number, because the mean of its divisors is an integer number (83525904).

Almost surely, 2^1228638192 is an apocalyptic number.

1228638192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1228638192 is an abundant number, since it is smaller than the sum of its proper divisors (2112397968).

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

1228638192 is a wasteful number, since it uses less digits than its factorization.

1228638192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347221 (or 1347215 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1228638192 is about 35051.9356384209. The cubic root of 1228638192 is about 1071.0457043495.

The spelling of 1228638192 in words is "one billion, two hundred twenty-eight million, six hundred thirty-eight thousand, one hundred ninety-two".