1228271290 has 16 divisors (see below), whose sum is σ = 2252604168. Its totient is φ = 482038336.

The previous prime is 1228271273. The next prime is 1228271309. The reversal of 1228271290 is 921728221.

It can be written as a sum of positive squares in 4 ways, for example, as 1045940281 + 182331009 = 32341^2 + 13503^2 .

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, 1158217 + ... + 1159276.

Almost surely, 2^1228271290 is an apocalyptic number.

1228271290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228271290 is a deficient number, since it is larger than the sum of its proper divisors (1024332878).

1228271290 is a wasteful number, since it uses less digits than its factorization.

1228271290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317553.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1228271290 is about 35046.7015566373. The cubic root of 1228271290 is about 1070.9390800840.

The spelling of 1228271290 in words is "one billion, two hundred twenty-eight million, two hundred seventy-one thousand, two hundred ninety".