1020225690 has 96 divisors (see below), whose sum is σ = 2926497600. Its totient is φ = 244527360.

The previous prime is 1020225677. The next prime is 1020225749. The reversal of 1020225690 is 965220201.

It is a super-2 number, since 2×1020225690² = 2081720917071952200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82321 + ... + 93899.

It is an arithmetic number, because the mean of its divisors is an integer number (30484350).

Almost surely, 2^1020225690 is an apocalyptic number.

1020225690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020225690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463248800).

1020225690 is an abundant number, since it is smaller than the sum of its proper divisors (1906271910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020225690 is a wasteful number, since it uses less digits than its factorization.

1020225690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11692 (or 11689 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1020225690 is about 31940.9719639212. The cubic root of 1020225690 is about 1006.6969474442.

Adding to 1020225690 its reverse (965220201), we get a palindrome (1985445891).

The spelling of 1020225690 in words is "one billion, twenty million, two hundred twenty-five thousand, six hundred ninety".