1772089650 has 168 divisors, whose sum is σ = 5029185924. Its totient is φ = 464227200.

The previous prime is 1772089621. The next prime is 1772089681. The reversal of 1772089650 is 569802771.

It can be written as a sum of positive squares in 6 ways, for example, as 190357209 + 1581732441 = 13797^2 + 39771^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1772089596 and 1772089605.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 2223052 + ... + 2223848.

Almost surely, 2^1772089650 is an apocalyptic number.

1772089650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1772089650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2514592962).

1772089650 is an abundant number, since it is smaller than the sum of its proper divisors (3257096274).

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

1772089650 is an equidigital number, since it uses as much as digits as its factorization.

1772089650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 1772089650 is about 42096.1951962407. The cubic root of 1772089650 is about 1210.1203463844.

The spelling of 1772089650 in words is "one billion, seven hundred seventy-two million, eighty-nine thousand, six hundred fifty".