145023320 has 32 divisors (see below), whose sum is σ = 351403920. Its totient is φ = 53546880.

The previous prime is 145023293. The next prime is 145023337. The reversal of 145023320 is 23320541.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 145023292 and 145023301.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 138926 + ... + 139965.

Almost surely, 2^145023320 is an apocalyptic number.

145023320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145023320 is an abundant number, since it is smaller than the sum of its proper divisors (206380600).

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

145023320 is a wasteful number, since it uses less digits than its factorization.

145023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278915 (or 278911 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 145023320 is about 12042.5628501578. The cubic root of 145023320 is about 525.3869498015.

Adding to 145023320 its reverse (23320541), we get a palindrome (168343861).

The spelling of 145023320 in words is "one hundred forty-five million, twenty-three thousand, three hundred twenty".