1806265220 has 24 divisors (see below), whose sum is σ = 3915518208. Its totient is φ = 699199200.

The previous prime is 1806265183. The next prime is 1806265231. The reversal of 1806265220 is 225626081.

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, 1456046 + ... + 1457285.

It is an arithmetic number, because the mean of its divisors is an integer number (163146592).

Almost surely, 2^1806265220 is an apocalyptic number.

1806265220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806265220 is an abundant number, since it is smaller than the sum of its proper divisors (2109252988).

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

1806265220 is a wasteful number, since it uses less digits than its factorization.

1806265220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913371 (or 2913369 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1806265220 is about 42500.1790584463. The cubic root of 1806265220 is about 1217.8501104823.

The spelling of 1806265220 in words is "one billion, eight hundred six million, two hundred sixty-five thousand, two hundred twenty".