Search a number
7913838 = 231318973
BaseRepresentation
bin11110001100000101101110
3112220001202010
4132030011232
54011220323
6441342050
7124160262
oct36140556
915801663
107913838
114515869
122797926
13184115a
1410a00a2
15a64c93
hex78c16e

7913838 has 8 divisors (see below), whose sum is σ = 15827688. Its totient is φ = 2637944.

The previous prime is 7913833. The next prime is 7913887. The reversal of 7913838 is 8383197.

7913838 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7913796 and 7913805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7913831) 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, 659481 + ... + 659492.

It is an arithmetic number, because the mean of its divisors is an integer number (1978461).

Almost surely, 27913838 is an apocalyptic number.

7913838 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.

7913838 is a wasteful number, since it uses less digits than its factorization.

7913838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318978.

The product of its digits is 36288, while the sum is 39.

The square root of 7913838 is about 2813.1544571886. The cubic root of 7913838 is about 199.2793900582.

The spelling of 7913838 in words is "seven million, nine hundred thirteen thousand, eight hundred thirty-eight".

Divisors: 1 2 3 6 1318973 2637946 3956919 7913838