1770221952 has 224 divisors, whose sum is σ = 5391462960. Its totient is φ = 578534400.

The previous prime is 1770221839. The next prime is 1770221987. The reversal of 1770221952 is 2591220771.

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 27 ways as a sum of consecutive naturals, for example, 5691877 + ... + 5692187.

It is a vampire number, since it can be written as 25191 ⋅ 70272 (with its own digits).

Almost surely, 2^1770221952 is an apocalyptic number.

1770221952 is a gapful number since it is divisible by the number (12) 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 1770221952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2695731480).

1770221952 is an abundant number, since it is smaller than the sum of its proper divisors (3621241008).

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

1770221952 is an frugal number, since it uses more digits than its factorization.

1770221952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1770221952 is about 42074.0056566997. The cubic root of 1770221952 is about 1209.6950605564.

The spelling of 1770221952 in words is "one billion, seven hundred seventy million, two hundred twenty-one thousand, nine hundred fifty-two".