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630644 = 227101223
BaseRepresentation
bin10011001111101110100
31012001002012
42121331310
5130140034
621303352
75234420
oct2317564
91161065
10630644
113a08a3
12264b58
13191081
14125b80
15c6cce
hex99f74

630644 has 24 divisors (see below), whose sum is σ = 1279488. Its totient is φ = 266400.

The previous prime is 630613. The next prime is 630659. The reversal of 630644 is 446036.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2717 + ... + 2939.

It is an arithmetic number, because the mean of its divisors is an integer number (53312).

2630644 is an apocalyptic number.

It is an amenable number.

630644 is an abundant number, since it is smaller than the sum of its proper divisors (648844).

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

630644 is a wasteful number, since it uses less digits than its factorization.

630644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 630644 is about 794.1309715658. The cubic root of 630644 is about 85.7553892807.

The spelling of 630644 in words is "six hundred thirty thousand, six hundred forty-four".

Divisors: 1 2 4 7 14 28 101 202 223 404 446 707 892 1414 1561 2828 3122 6244 22523 45046 90092 157661 315322 630644