1022428 has 24 divisors (see below), whose sum is σ = 2056320. Its totient is φ = 439920.

The previous prime is 1022389. The next prime is 1022429. The reversal of 1022428 is 8242201.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225 + ... + 1447.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2^1022428 is an apocalyptic number.

It is an amenable number.

1022428 is an abundant number, since it is smaller than the sum of its proper divisors (1033892).

1022428 is a wasteful number, since it uses less digits than its factorization.

1022428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1022428 is about 1011.1518184724. The cubic root of 1022428 is about 100.7420795576.

Adding to 1022428 its reverse (8242201), we get a palindrome (9264629).

The spelling of 1022428 in words is "one million, twenty-two thousand, four hundred twenty-eight".