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12381400028 = 223095350007
BaseRepresentation
bin10111000011111110…
…10010101111011100
31011221212210021211102
423201333102233130
5200324114300103
65404332212232
7615552110114
oct134177225734
934855707742
1012381400028
115283a83108
12249660a078
13122419300a
14856540044
154c6eace88
hex2e1fd2bdc

12381400028 has 6 divisors (see below), whose sum is σ = 21667450056. Its totient is φ = 6190700012.

The previous prime is 12381399991. The next prime is 12381400051. The reversal of 12381400028 is 82000418321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1547675000 + ... + 1547675007.

It is an arithmetic number, because the mean of its divisors is an integer number (3611241676).

Almost surely, 212381400028 is an apocalyptic number.

It is an amenable number.

12381400028 is a deficient number, since it is larger than the sum of its proper divisors (9286050028).

12381400028 is a wasteful number, since it uses less digits than its factorization.

12381400028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095350011 (or 3095350009 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

Adding to 12381400028 its reverse (82000418321), we get a palindrome (94381818349).

The spelling of 12381400028 in words is "twelve billion, three hundred eighty-one million, four hundred thousand, twenty-eight".

Divisors: 1 2 4 3095350007 6190700014 12381400028