145393930 has 16 divisors (see below), whose sum is σ = 285501024. Its totient is φ = 52870480.

The previous prime is 145393883. The next prime is 145393931. The reversal of 145393930 is 39393541.

145393930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145393930² = 42278789761689800, 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 145393930.

It is not an unprimeable number, because it can be changed into a prime (145393931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660772 + ... + 660991.

It is an arithmetic number, because the mean of its divisors is an integer number (17843814).

Almost surely, 2^145393930 is an apocalyptic number.

145393930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145393930 is a deficient number, since it is larger than the sum of its proper divisors (140107094).

145393930 is a wasteful number, since it uses less digits than its factorization.

145393930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321781.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 145393930 is about 12057.9405372559. The cubic root of 145393930 is about 525.8341147302.

The spelling of 145393930 in words is "one hundred forty-five million, three hundred ninety-three thousand, nine hundred thirty".