145027440 has 120 divisors (see below), whose sum is σ = 494084448. Its totient is φ = 38115840.

The previous prime is 145027429. The next prime is 145027447. The reversal of 145027440 is 44720541.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145027447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49702 + ... + 52538.

Almost surely, 2^145027440 is an apocalyptic number.

145027440 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 145027440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247042224).

145027440 is an abundant number, since it is smaller than the sum of its proper divisors (349057008).

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

145027440 is a wasteful number, since it uses less digits than its factorization.

145027440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 145027440 is about 12042.7339088763. The cubic root of 145027440 is about 525.3919250329.

Adding to 145027440 its reverse (44720541), we get a palindrome (189747981).

The spelling of 145027440 in words is "one hundred forty-five million, twenty-seven thousand, four hundred forty".