Search a number
-
+
1216407863 = 11283390751
BaseRepresentation
bin100100010000000…
…1110100100110111
310010202212220220002
41020200032210313
54442400022423
6320411501515
742100203416
oct11040164467
93122786802
101216407863
115746a3260
1229b45789b
1316501a888
14b77a147d
1571bcc228
hex4880e937

1216407863 has 8 divisors (see below), whose sum is σ = 1331682816. Its totient is φ = 1101915000.

The previous prime is 1216407859. The next prime is 1216407887. The reversal of 1216407863 is 3687046121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216407863 - 22 = 1216407859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216307863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192263 + ... + 198488.

It is an arithmetic number, because the mean of its divisors is an integer number (166460352).

Almost surely, 21216407863 is an apocalyptic number.

1216407863 is a deficient number, since it is larger than the sum of its proper divisors (115274953).

1216407863 is a wasteful number, since it uses less digits than its factorization.

1216407863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391045.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1216407863 is about 34877.0391948629. The cubic root of 1216407863 is about 1067.4799819277.

The spelling of 1216407863 in words is "one billion, two hundred sixteen million, four hundred seven thousand, eight hundred sixty-three".

Divisors: 1 11 283 3113 390751 4298261 110582533 1216407863