1242339228 has 48 divisors (see below), whose sum is σ = 3468643360. Its totient is φ = 382257792.

The previous prime is 1242339199. The next prime is 1242339233. The reversal of 1242339228 is 8229332421.

1242339228 is a `hidden beast` number, since 1 + 2 + 423 + 3 + 9 + 228 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1242339192 and 1242339201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441025 + ... + 443832.

Almost surely, 2^1242339228 is an apocalyptic number.

1242339228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1242339228 is an abundant number, since it is smaller than the sum of its proper divisors (2226304132).

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

1242339228 is a wasteful number, since it uses less digits than its factorization.

1242339228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884883 (or 884875 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1242339228 is about 35246.8328789978. The cubic root of 1242339228 is about 1075.0122163385.

The spelling of 1242339228 in words is "one billion, two hundred forty-two million, three hundred thirty-nine thousand, two hundred twenty-eight".