1827221760 has 864 divisors, whose sum is σ = 8220804480. Its totient is φ = 380878848.

The previous prime is 1827221743. The next prime is 1827221777. The reversal of 1827221760 is 671227281.

It is an interprime number because it is at equal distance from previous prime (1827221743) and next prime (1827221777).

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22014679 + ... + 22014761.

It is an arithmetic number, because the mean of its divisors is an integer number (9514820).

Almost surely, 2^1827221760 is an apocalyptic number.

1827221760 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 1827221760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4110402240).

1827221760 is an abundant number, since it is smaller than the sum of its proper divisors (6393582720).

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

1827221760 is a wasteful number, since it uses less digits than its factorization.

1827221760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 1827221760 is about 42746.0145510666. The cubic root of 1827221760 is about 1222.5419007807.

The spelling of 1827221760 in words is "one billion, eight hundred twenty-seven million, two hundred twenty-one thousand, seven hundred sixty".