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145388 = 22191913
BaseRepresentation
bin100011011111101100
321101102202
4203133230
514123023
63041032
71143605
oct433754
9241382
10145388
119a261
1270178
1351239
152d128
hex237ec

145388 has 12 divisors (see below), whose sum is σ = 267960. Its totient is φ = 68832.

The previous prime is 145381. The next prime is 145391. The reversal of 145388 is 883541.

It is a super-2 number, since 2×1453882 = 42275341088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145388.

It is not an unprimeable number, because it can be changed into a prime (145381) by changing a digit.

145388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881 + ... + 1032.

It is an arithmetic number, because the mean of its divisors is an integer number (22330).

2145388 is an apocalyptic number.

It is an amenable number.

145388 is a deficient number, since it is larger than the sum of its proper divisors (122572).

145388 is a wasteful number, since it uses less digits than its factorization.

145388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936 (or 1934 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 145388 is about 381.2977838908. The cubic root of 145388 is about 52.5826965787.

The spelling of 145388 in words is "one hundred forty-five thousand, three hundred eighty-eight".