Search a number
-
+
78948107 = 711278301
BaseRepresentation
bin1001011010010…
…10011100001011
312111112222102222
410231022130023
5130202314412
611500044255
71646022260
oct455123413
9174488388
1078948107
1140622977
122253368b
1313482674
14a6b1267
156de7072
hex4b4a70b

78948107 has 4 divisors (see below), whose sum is σ = 90226416. Its totient is φ = 67669800.

The previous prime is 78948101. The next prime is 78948137. The reversal of 78948107 is 70184987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70184987 = 431632209.

It is a cyclic number.

It is not a de Polignac number, because 78948107 - 28 = 78947851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78948101) 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 3 ways as a sum of consecutive naturals, for example, 5639144 + ... + 5639157.

It is an arithmetic number, because the mean of its divisors is an integer number (22556604).

Almost surely, 278948107 is an apocalyptic number.

78948107 is a deficient number, since it is larger than the sum of its proper divisors (11278309).

78948107 is a wasteful number, since it uses less digits than its factorization.

78948107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11278308.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 78948107 is about 8885.2747284482. The cubic root of 78948107 is about 428.9900708232.

The spelling of 78948107 in words is "seventy-eight million, nine hundred forty-eight thousand, one hundred seven".

Divisors: 1 7 11278301 78948107