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38630980 = 2251931549
BaseRepresentation
bin1001001101011…
…1011001000100
32200200122202001
42103113121010
534342142410
63455555044
7646233523
oct223273104
980618661
1038630980
111a896033
1210b2ba84
13800768b
1451b84ba
1535d133a
hex24d7644

38630980 has 12 divisors (see below), whose sum is σ = 81125100. Its totient is φ = 15452384.

The previous prime is 38630957. The next prime is 38630981. The reversal of 38630980 is 8903683.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 29095236 = 3088^2 + 5394^2 .

It is not an unprimeable number, because it can be changed into a prime (38630981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965755 + ... + 965794.

It is an arithmetic number, because the mean of its divisors is an integer number (6760425).

Almost surely, 238630980 is an apocalyptic number.

It is an amenable number.

38630980 is an abundant number, since it is smaller than the sum of its proper divisors (42494120).

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

38630980 is a wasteful number, since it uses less digits than its factorization.

38630980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931558 (or 1931556 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 38630980 is about 6215.3825304642. The cubic root of 38630980 is about 338.0481590517.

The spelling of 38630980 in words is "thirty-eight million, six hundred thirty thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 1931549 3863098 7726196 9657745 19315490 38630980