145444540 has 12 divisors (see below), whose sum is σ = 305433576. Its totient is φ = 58177808.

The previous prime is 145444531. The next prime is 145444547. The reversal of 145444540 is 45444541.

It is a super-2 number, since 2×145444540² = 42308228431623200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145444547) 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, 3636094 + ... + 3636133.

It is an arithmetic number, because the mean of its divisors is an integer number (25452798).

Almost surely, 2^145444540 is an apocalyptic number.

145444540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145444540 is an abundant number, since it is smaller than the sum of its proper divisors (159989036).

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

145444540 is a wasteful number, since it uses less digits than its factorization.

145444540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272236 (or 7272234 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

The square root of 145444540 is about 12060.0389717447. The cubic root of 145444540 is about 525.8951199760.

Subtracting from 145444540 its reverse (45444541), we obtain a palindrome (99999999).

The spelling of 145444540 in words is "one hundred forty-five million, four hundred forty-four thousand, five hundred forty".