1650718440 has 224 divisors, whose sum is σ = 6364932480. Its totient is φ = 377260416.

The previous prime is 1650718439. The next prime is 1650718469. The reversal of 1650718440 is 448170561.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1650718395 and 1650718404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 200077 + ... + 208163.

Almost surely, 2^1650718440 is an apocalyptic number.

1650718440 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 1650718440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3182466240).

1650718440 is an abundant number, since it is smaller than the sum of its proper divisors (4714214040).

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

1650718440 is an equidigital number, since it uses as much as digits as its factorization.

1650718440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8123 (or 8104 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1650718440 is about 40629.0344458246. The cubic root of 1650718440 is about 1181.8372318321.

The spelling of 1650718440 in words is "one billion, six hundred fifty million, seven hundred eighteen thousand, four hundred forty".