Search a number
-
+
68928800 = 255286161
BaseRepresentation
bin1000001101111…
…00010100100000
311210200221112112
410012330110200
5120121210200
610501214452
71464612413
oct406742440
9153627475
1068928800
11359aa256
121b101428
1311385095
149223b7a
1560b8535
hex41bc520

68928800 has 36 divisors (see below), whose sum is σ = 168274386. Its totient is φ = 27571200.

The previous prime is 68928799. The next prime is 68928803. The reversal of 68928800 is 882986.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 36529936 + 32398864 = 6044^2 + 5692^2 .

It is not an unprimeable number, because it can be changed into a prime (68928803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42281 + ... + 43880.

Almost surely, 268928800 is an apocalyptic number.

It is an amenable number.

68928800 is an abundant number, since it is smaller than the sum of its proper divisors (99345586).

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

68928800 is a wasteful number, since it uses less digits than its factorization.

68928800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86181 (or 86168 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 68928800 is about 8302.3370203817. The cubic root of 68928800 is about 410.0154664005.

The spelling of 68928800 in words is "sixty-eight million, nine hundred twenty-eight thousand, eight hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 160 200 400 800 86161 172322 344644 430805 689288 861610 1378576 1723220 2154025 2757152 3446440 4308050 6892880 8616100 13785760 17232200 34464400 68928800