145325440 has 64 divisors (see below), whose sum is σ = 374164560. Its totient is φ = 53655552.

The previous prime is 145325429. The next prime is 145325459. The reversal of 145325440 is 44523541.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×145325440² = 42238967022387200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145325399 and 145325408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414 + ... + 17053.

Almost surely, 2^145325440 is an apocalyptic number.

145325440 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 145325440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187082280).

145325440 is an abundant number, since it is smaller than the sum of its proper divisors (228839120).

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

145325440 is a wasteful number, since it uses less digits than its factorization.

145325440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17499 (or 17487 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 145325440 is about 12055.1001654901. The cubic root of 145325440 is about 525.7515344028.

Adding to 145325440 its reverse (44523541), we get a palindrome (189848981).

The spelling of 145325440 in words is "one hundred forty-five million, three hundred twenty-five thousand, four hundred forty".