145686834 has 24 divisors (see below), whose sum is σ = 324187500. Its totient is φ = 47249568.

The previous prime is 145686833. The next prime is 145686841. The reversal of 145686834 is 438686541.

145686834 is a `hidden beast` number, since 1 + 4 + 568 + 6 + 83 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 133471809 + 12215025 = 11553^2 + 3495^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145686834.

It is not an unprimeable number, because it can be changed into a prime (145686833) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 108709 + ... + 110040.

Almost surely, 2^145686834 is an apocalyptic number.

145686834 is an abundant number, since it is smaller than the sum of its proper divisors (178500666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145686834 is a wasteful number, since it uses less digits than its factorization.

145686834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218794 (or 218791 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 145686834 is about 12070.0801157242. The cubic root of 145686834 is about 526.1869850429.

The spelling of 145686834 in words is "one hundred forty-five million, six hundred eighty-six thousand, eight hundred thirty-four".