1906304220 has 120 divisors (see below), whose sum is σ = 6001191504. Its totient is φ = 506559744.

The previous prime is 1906304209. The next prime is 1906304233. The reversal of 1906304220 is 224036091.

1906304220 is a `hidden beast` number, since 1 + 9 + 0 + 630 + 4 + 2 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 495424 + ... + 499256.

Almost surely, 2^1906304220 is an apocalyptic number.

1906304220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906304220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3000595752).

1906304220 is an abundant number, since it is smaller than the sum of its proper divisors (4094887284).

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

1906304220 is a wasteful number, since it uses less digits than its factorization.

1906304220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161 (or 4150 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1906304220 is about 43661.2439126510. The cubic root of 1906304220 is about 1239.9306716355.

The spelling of 1906304220 in words is "one billion, nine hundred six million, three hundred four thousand, two hundred twenty".