1990025316 has 72 divisors (see below), whose sum is σ = 5193736184. Its totient is φ = 641986560.

The previous prime is 1990025311. The next prime is 1990025329. The reversal of 1990025316 is 6135200991.

It can be written as a sum of positive squares in 4 ways, for example, as 205807716 + 1784217600 = 14346^2 + 42240^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1990025311) 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, 253206 + ... + 260946.

Almost surely, 2^1990025316 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 1990025316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2596868092).

1990025316 is an abundant number, since it is smaller than the sum of its proper divisors (3203710868).

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

1990025316 is a wasteful number, since it uses less digits than its factorization.

1990025316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7981 (or 7976 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1990025316 is about 44609.6997972414. The cubic root of 1990025316 is about 1257.8230057421.

The spelling of 1990025316 in words is "one billion, nine hundred ninety million, twenty-five thousand, three hundred sixteen".