145422320 has 20 divisors (see below), whose sum is σ = 338107080. Its totient is φ = 58168896.

The previous prime is 145422283. The next prime is 145422323. The reversal of 145422320 is 23224541.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×145422320² = 42295302308364800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145422323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908810 + ... + 908969.

It is an arithmetic number, because the mean of its divisors is an integer number (16905354).

Almost surely, 2^145422320 is an apocalyptic number.

145422320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145422320 is an abundant number, since it is smaller than the sum of its proper divisors (192684760).

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

145422320 is a wasteful number, since it uses less digits than its factorization.

145422320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817792 (or 1817786 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 145422320 is about 12059.1177123370. The cubic root of 145422320 is about 525.8683377521.

Adding to 145422320 its reverse (23224541), we get a palindrome (168646861).

The spelling of 145422320 in words is "one hundred forty-five million, four hundred twenty-two thousand, three hundred twenty".