18202628 has 6 divisors (see below), whose sum is σ = 31854606. Its totient is φ = 9101312.

The previous prime is 18202609. The next prime is 18202643. The reversal of 18202628 is 82620281.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 7496644 = 3272^2 + 2738^2 .

It is a super-2 number, since 2×18202628² = 662671332212768, 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 18202628.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2275325 + ... + 2275332.

It is an arithmetic number, because the mean of its divisors is an integer number (5309101).

Almost surely, 2^18202628 is an apocalyptic number.

It is an amenable number.

18202628 is a deficient number, since it is larger than the sum of its proper divisors (13651978).

18202628 is a wasteful number, since it uses less digits than its factorization.

18202628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550661 (or 4550659 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18202628 is about 4266.4537967731. The cubic root of 18202628 is about 263.0538714841.

The spelling of 18202628 in words is "eighteen million, two hundred two thousand, six hundred twenty-eight".