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630642 = 23105107
BaseRepresentation
bin10011001111101110010
31012001002010
42121331302
5130140032
621303350
75234415
oct2317562
91161063
10630642
113a08a1
12264b56
1319107c
14125b7c
15c6ccc
hex99f72

630642 has 8 divisors (see below), whose sum is σ = 1261296. Its totient is φ = 210212.

The previous prime is 630613. The next prime is 630659. The reversal of 630642 is 246036.

It is a sphenic number, since it is the product of 3 distinct primes.

630642 is an admirable number.

It is an unprimeable number.

630642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52548 + ... + 52559.

It is an arithmetic number, because the mean of its divisors is an integer number (157662).

2630642 is an apocalyptic number.

630642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

630642 is a wasteful number, since it uses less digits than its factorization.

630642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105112.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 630642 is about 794.1297123266. The cubic root of 630642 is about 85.7552986268.

Adding to 630642 its reverse (246036), we get a palindrome (876678).

The spelling of 630642 in words is "six hundred thirty thousand, six hundred forty-two".

Divisors: 1 2 3 6 105107 210214 315321 630642