145404320 has 96 divisors (see below), whose sum is σ = 355803840. Its totient is φ = 56125440.

The previous prime is 145404307. The next prime is 145404331. The reversal of 145404320 is 23404541.

It is a super-2 number, since 2×145404320² = 42284832549324800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 689015 + ... + 689225.

It is an arithmetic number, because the mean of its divisors is an integer number (3706290).

Almost surely, 2^145404320 is an apocalyptic number.

145404320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145404320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177901920).

145404320 is an abundant number, since it is smaller than the sum of its proper divisors (210399520).

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

145404320 is a wasteful number, since it uses less digits than its factorization.

145404320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 350 counting only the distinct ones).

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

The square root of 145404320 is about 12058.3713659847. The cubic root of 145404320 is about 525.8466399810.

Adding to 145404320 its reverse (23404541), we get a palindrome (168808861).

The spelling of 145404320 in words is "one hundred forty-five million, four hundred four thousand, three hundred twenty".