1020388 has 6 divisors (see below), whose sum is σ = 1785686. Its totient is φ = 510192.

The previous prime is 1020379. The next prime is 1020389. The reversal of 1020388 is 8830201.

It can be written as a sum of positive squares in only one way, i.e., 1004004 + 16384 = 1002^2 + 128^2 .

It is not an unprimeable number, because it can be changed into a prime (1020389) 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 as a sum of consecutive naturals, namely, 127545 + ... + 127552.

2^1020388 is an apocalyptic number.

It is an amenable number.

1020388 is a deficient number, since it is larger than the sum of its proper divisors (765298).

1020388 is a wasteful number, since it uses less digits than its factorization.

1020388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255101 (or 255099 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1020388 is about 1010.1425641958. The cubic root of 1020388 is about 100.6750330507.

Adding to 1020388 its reverse (8830201), we get a palindrome (9850589).

The spelling of 1020388 in words is "one million, twenty thousand, three hundred eighty-eight".