102220028 has 6 divisors (see below), whose sum is σ = 178885056. Its totient is φ = 51110012.

The previous prime is 102220007. The next prime is 102220039. The reversal of 102220028 is 820022201.

It is a junction number, because it is equal to n+sod(n) for n = 102219988 and 102220015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777500 + ... + 12777507.

It is an arithmetic number, because the mean of its divisors is an integer number (29814176).

Almost surely, 2^102220028 is an apocalyptic number.

It is an amenable number.

102220028 is a deficient number, since it is larger than the sum of its proper divisors (76665028).

102220028 is a wasteful number, since it uses less digits than its factorization.

102220028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25555011 (or 25555009 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 102220028 is about 10110.3920794398. The cubic root of 102220028 is about 467.5685933649.

Adding to 102220028 its reverse (820022201), we get a palindrome (922242229).

The spelling of 102220028 in words is "one hundred two million, two hundred twenty thousand, twenty-eight".