1630656 has 84 divisors (see below), whose sum is σ = 4953000. Its totient is φ = 511488.

The previous prime is 1630633. The next prime is 1630663. The reversal of 1630656 is 6560361.

1630656 is a `hidden beast` number, since 1 + 6 + 3 + 0 + 656 = 666.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10870 + ... + 11018.

2^1630656 is an apocalyptic number.

1630656 is a gapful number since it is divisible by the number (16) 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 1630656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476500).

1630656 is an abundant number, since it is smaller than the sum of its proper divisors (3322344).

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

1630656 is a wasteful number, since it uses less digits than its factorization.

1630656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1630656 is about 1276.9714170646. The cubic root of 1630656 is about 117.7029779657.

The spelling of 1630656 in words is "one million, six hundred thirty thousand, six hundred fifty-six".