631528650 has 240 divisors, whose sum is σ = 1917511200. Its totient is φ = 153498240.

The previous prime is 631528633. The next prime is 631528661. The reversal of 631528650 is 56825136.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2231409 + ... + 2231691.

It is an arithmetic number, because the mean of its divisors is an integer number (7989630).

Almost surely, 2^631528650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631528650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958755600).

631528650 is an abundant number, since it is smaller than the sum of its proper divisors (1285982550).

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

631528650 is a wasteful number, since it uses less digits than its factorization.

631528650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 631528650 is about 25130.2337832341. The cubic root of 631528650 is about 857.9546897682.

The spelling of 631528650 in words is "six hundred thirty-one million, five hundred twenty-eight thousand, six hundred fifty".