1228390 has 8 divisors (see below), whose sum is σ = 2211120. Its totient is φ = 491352.

The previous prime is 1228373. The next prime is 1228391. The reversal of 1228390 is 938221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61410 + ... + 61429.

It is an arithmetic number, because the mean of its divisors is an integer number (276390).

2^1228390 is an apocalyptic number.

1228390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228390 is a deficient number, since it is larger than the sum of its proper divisors (982730).

1228390 is a wasteful number, since it uses less digits than its factorization.

1228390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122846.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1228390 is about 1108.3275689073. The cubic root of 1228390 is about 107.0973580357.

The spelling of 1228390 in words is "one million, two hundred twenty-eight thousand, three hundred ninety".