145120440 has 32 divisors (see below), whose sum is σ = 435361680. Its totient is φ = 38698752.

The previous prime is 145120429. The next prime is 145120453. The reversal of 145120440 is 44021541.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604549 + ... + 604788.

Almost surely, 2^145120440 is an apocalyptic number.

145120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145120440 is an abundant number, since it is smaller than the sum of its proper divisors (290241240).

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

145120440 is a wasteful number, since it uses less digits than its factorization.

145120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209351 (or 1209347 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 145120440 is about 12046.5945395369. The cubic root of 145120440 is about 525.5042049538.

Adding to 145120440 its reverse (44021541), we get a palindrome (189141981).

The spelling of 145120440 in words is "one hundred forty-five million, one hundred twenty thousand, four hundred forty".