2028436 has 6 divisors (see below), whose sum is σ = 3549770. Its totient is φ = 1014216.

The previous prime is 2028431. The next prime is 2028443. The reversal of 2028436 is 6348202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 988036 = 1020^2 + 994^2 .

It is a super-2 number, since 2×2028436² = 8229105212192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2028436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028431) 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 as a sum of consecutive naturals, namely, 253551 + ... + 253558.

2^2028436 is an apocalyptic number.

It is an amenable number.

2028436 is a deficient number, since it is larger than the sum of its proper divisors (1521334).

2028436 is a wasteful number, since it uses less digits than its factorization.

2028436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507113 (or 507111 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 2028436 is about 1424.2317227193. The cubic root of 2028436 is about 126.5864157721.

The spelling of 2028436 in words is "two million, twenty-eight thousand, four hundred thirty-six".