145663240 has 32 divisors (see below), whose sum is σ = 330759000. Its totient is φ = 57729024.

The previous prime is 145663237. The next prime is 145663247. The reversal of 145663240 is 42366541.

It can be written as a sum of positive squares in 4 ways, for example, as 106048804 + 39614436 = 10298^2 + 6294^2 .

It is not an unprimeable number, because it can be changed into a prime (145663247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12345 + ... + 21064.

Almost surely, 2^145663240 is an apocalyptic number.

145663240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145663240 is an abundant number, since it is smaller than the sum of its proper divisors (185095760).

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

145663240 is a wasteful number, since it uses less digits than its factorization.

145663240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33529 (or 33525 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 145663240 is about 12069.1027006982. The cubic root of 145663240 is about 526.1585781612.

The spelling of 145663240 in words is "one hundred forty-five million, six hundred sixty-three thousand, two hundred forty".