1228190290 has 8 divisors (see below), whose sum is σ = 2210742540. Its totient is φ = 491276112.

The previous prime is 1228190273. The next prime is 1228190297. The reversal of 1228190290 is 920918221.

It can be written as a sum of positive squares in 2 ways, for example, as 1221013249 + 7177041 = 34943^2 + 2679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1228190297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61409505 + ... + 61409524.

Almost surely, 2^1228190290 is an apocalyptic number.

1228190290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228190290 is a deficient number, since it is larger than the sum of its proper divisors (982552250).

1228190290 is a wasteful number, since it uses less digits than its factorization.

1228190290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122819036.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1228190290 is about 35045.5459366807. The cubic root of 1228190290 is about 1070.9155380612.

The spelling of 1228190290 in words is "one billion, two hundred twenty-eight million, one hundred ninety thousand, two hundred ninety".