145909864 has 16 divisors (see below), whose sum is σ = 274094820. Its totient is φ = 72817920.

The previous prime is 145909837. The next prime is 145909913. The reversal of 145909864 is 468909541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136656100 + 9253764 = 11690^2 + 3042^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12529 + ... + 21184.

Almost surely, 2^145909864 is an apocalyptic number.

It is an amenable number.

145909864 is a deficient number, since it is larger than the sum of its proper divisors (128184956).

145909864 is a wasteful number, since it uses less digits than its factorization.

145909864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34260 (or 34256 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 145909864 is about 12079.3155435232. The cubic root of 145909864 is about 526.4553589812.

The spelling of 145909864 in words is "one hundred forty-five million, nine hundred nine thousand, eight hundred sixty-four".