1242620328 has 16 divisors (see below), whose sum is σ = 3106550880. Its totient is φ = 414206768.

The previous prime is 1242620317. The next prime is 1242620347. The reversal of 1242620328 is 8230262421.

It is a junction number, because it is equal to n+sod(n) for n = 1242620295 and 1242620304.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25887900 + ... + 25887947.

It is an arithmetic number, because the mean of its divisors is an integer number (194159430).

Almost surely, 2^1242620328 is an apocalyptic number.

It is an amenable number.

1242620328 is an abundant number, since it is smaller than the sum of its proper divisors (1863930552).

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

1242620328 is a wasteful number, since it uses less digits than its factorization.

1242620328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51775856 (or 51775852 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1242620328 is about 35250.8202457758. The cubic root of 1242620328 is about 1075.0932900471.

Adding to 1242620328 its reverse (8230262421), we get a palindrome (9472882749).

The spelling of 1242620328 in words is "one billion, two hundred forty-two million, six hundred twenty thousand, three hundred twenty-eight".