1005208220 has 24 divisors (see below), whose sum is σ = 2120950608. Its totient is φ = 400176000.

The previous prime is 1005208219. The next prime is 1005208241. The reversal of 1005208220 is 228025001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1005208192 and 1005208201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114881 + ... + 123320.

It is an arithmetic number, because the mean of its divisors is an integer number (88372942).

Almost surely, 2^1005208220 is an apocalyptic number.

1005208220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005208220 is an abundant number, since it is smaller than the sum of its proper divisors (1115742388).

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

1005208220 is a wasteful number, since it uses less digits than its factorization.

1005208220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238421 (or 238419 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1005208220 is about 31705.0188456023. The cubic root of 1005208220 is about 1001.7330680733.

The spelling of 1005208220 in words is "one billion, five million, two hundred eight thousand, two hundred twenty".