145244440 has 64 divisors (see below), whose sum is σ = 360612000. Its totient is φ = 52208640.

The previous prime is 145244401. The next prime is 145244443. The reversal of 145244440 is 44442541.

It is a junction number, because it is equal to n+sod(n) for n = 145244399 and 145244408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145244443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37306 + ... + 41014.

Almost surely, 2^145244440 is an apocalyptic number.

145244440 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 145244440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180306000).

145244440 is an abundant number, since it is smaller than the sum of its proper divisors (215367560).

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

145244440 is a wasteful number, since it uses less digits than its factorization.

145244440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 145244440 is about 12051.7401233183. The cubic root of 145244440 is about 525.6538369206.

Adding to 145244440 its reverse (44442541), we get a palindrome (189686981).

The spelling of 145244440 in words is "one hundred forty-five million, two hundred forty-four thousand, four hundred forty".