1006256220 has 24 divisors (see below), whose sum is σ = 2817517584. Its totient is φ = 268334976.

The previous prime is 1006256191. The next prime is 1006256221. The reversal of 1006256220 is 226526001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006256221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8385409 + ... + 8385528.

It is an arithmetic number, because the mean of its divisors is an integer number (117396566).

Almost surely, 2^1006256220 is an apocalyptic number.

1006256220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1006256220 is an abundant number, since it is smaller than the sum of its proper divisors (1811261364).

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

1006256220 is a wasteful number, since it uses less digits than its factorization.

1006256220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16770949 (or 16770947 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1006256220 is about 31721.5418919068. The cubic root of 1006256220 is about 1002.0810727984.

The spelling of 1006256220 in words is "one billion, six million, two hundred fifty-six thousand, two hundred twenty".