1630894520 has 64 divisors (see below), whose sum is σ = 3745526400. Its totient is φ = 638928000.

The previous prime is 1630894519. The next prime is 1630894537. The reversal of 1630894520 is 254980361.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723395 + ... + 725645.

It is an arithmetic number, because the mean of its divisors is an integer number (58523850).

Almost surely, 2^1630894520 is an apocalyptic number.

1630894520 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 1630894520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1872763200).

1630894520 is an abundant number, since it is smaller than the sum of its proper divisors (2114631880).

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

1630894520 is a wasteful number, since it uses less digits than its factorization.

1630894520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1630894520 is about 40384.3350818111. The cubic root of 1630894520 is about 1177.0871658576.

The spelling of 1630894520 in words is "one billion, six hundred thirty million, eight hundred ninety-four thousand, five hundred twenty".