1392228 has 30 divisors (see below), whose sum is σ = 3640406. Its totient is φ = 463968.

The previous prime is 1392221. The next prime is 1392229. The reversal of 1392228 is 8222931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1205604 + 186624 = 1098^2 + 432^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1392221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1825 + ... + 2472.

2^1392228 is an apocalyptic number.

1392228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1392228 is an abundant number, since it is smaller than the sum of its proper divisors (2248178).

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

1392228 is a wasteful number, since it uses less digits than its factorization.

1392228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313 (or 4302 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1392228 is about 1179.9271163932. The cubic root of 1392228 is about 111.6614992287.

The spelling of 1392228 in words is "one million, three hundred ninety-two thousand, two hundred twenty-eight".