1650145728 has 336 divisors, whose sum is σ = 5599704320. Its totient is φ = 419696640.

The previous prime is 1650145727. The next prime is 1650145729. The reversal of 1650145728 is 8275410561.

It is an interprime number because it is at equal distance from previous prime (1650145727) and next prime (1650145729).

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650145723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11871483 + ... + 11871621.

Almost surely, 2^1650145728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1650145728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2799852160).

1650145728 is an abundant number, since it is smaller than the sum of its proper divisors (3949558592).

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

1650145728 is a wasteful number, since it uses less digits than its factorization.

1650145728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 1650145728 is about 40621.9857712545. The cubic root of 1650145728 is about 1181.7005376831.

The spelling of 1650145728 in words is "one billion, six hundred fifty million, one hundred forty-five thousand, seven hundred twenty-eight".