1228378926 has 24 divisors (see below), whose sum is σ = 2542430520. Its totient is φ = 395191552.

The previous prime is 1228378909. The next prime is 1228378961. The reversal of 1228378926 is 6298738221.

1228378926 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460990 + ... + 463646.

It is an arithmetic number, because the mean of its divisors is an integer number (105934605).

Almost surely, 2^1228378926 is an apocalyptic number.

1228378926 is an abundant number, since it is smaller than the sum of its proper divisors (1314051594).

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

1228378926 is an frugal number, since it uses more digits than its factorization.

1228378926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348 (or 2691 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 1228378926 is about 35048.2371311311. The cubic root of 1228378926 is about 1070.9703620527.

The spelling of 1228378926 in words is "one billion, two hundred twenty-eight million, three hundred seventy-eight thousand, nine hundred twenty-six".