145681930 has 32 divisors (see below), whose sum is σ = 277488000. Its totient is φ = 54914112.

The previous prime is 145681889. The next prime is 145681933. The reversal of 145681930 is 39186541.

145681930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 145681930.

It is not an unprimeable number, because it can be changed into a prime (145681933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35884 + ... + 39736.

It is an arithmetic number, because the mean of its divisors is an integer number (8671500).

Almost surely, 2^145681930 is an apocalyptic number.

145681930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145681930 is a deficient number, since it is larger than the sum of its proper divisors (131806070).

145681930 is a wasteful number, since it uses less digits than its factorization.

145681930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 145681930 is about 12069.8769670614. The cubic root of 145681930 is about 526.1810809406.

It can be divided in two parts, 1456819 and 30, that added together give a square (1456849 = 1207²).

The spelling of 145681930 in words is "one hundred forty-five million, six hundred eighty-one thousand, nine hundred thirty".