1789221252 has 72 divisors (see below), whose sum is σ = 5166549696. Its totient is φ = 471878784.

The previous prime is 1789221251. The next prime is 1789221257. The reversal of 1789221252 is 2521229871.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1789221252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1789221251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48823 + ... + 77214.

Almost surely, 2^1789221252 is an apocalyptic number.

1789221252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1789221252 is an abundant number, since it is smaller than the sum of its proper divisors (3377328444).

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

1789221252 is a wasteful number, since it uses less digits than its factorization.

1789221252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126077 (or 126062 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 1789221252 is about 42299.1873680807. The cubic root of 1789221252 is about 1214.0074428660.

The spelling of 1789221252 in words is "one billion, seven hundred eighty-nine million, two hundred twenty-one thousand, two hundred fifty-two".