220402 has 24 divisors (see below), whose sum is σ = 416556. Its totient is φ = 86688.

The previous prime is 220399. The next prime is 220403. The reversal of 220402 is 204022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 219961 + 441 = 469^2 + 21^2 .

It is not an unprimeable number, because it can be changed into a prime (220403) 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 in 11 ways as a sum of consecutive naturals, for example, 1188 + ... + 1360.

2^{220402} is an apocalyptic number.

220402 is a deficient number, since it is larger than the sum of its proper divisors (196154).

220402 is a wasteful number, since it uses less digits than its factorization.

220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 220402 is about 469.4699138390. The cubic root of 220402 is about 60.4048546600.

Adding to 220402 its reverse (204022), we get a palindrome (424424).

It can be divided in two parts, 2 and 20402, that multiplied together give a palindrome (40804).

The spelling of 220402 in words is "two hundred twenty thousand, four hundred two", and thus it is an iban number.

Divisors: 1 2 7 13 14 26 49 91 98 173 182 346 637 1211 1274 2249 2422 4498 8477 15743 16954 31486 110201 220402

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