145246644 has 18 divisors (see below), whose sum is σ = 367151330. Its totient is φ = 48415536.

The previous prime is 145246639. The next prime is 145246667. The reversal of 145246644 is 446642541.

145246644 is a `hidden beast` number, since 1 + 4 + 5 + 2 + 4 + 6 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 142563600 + 2683044 = 11940^2 + 1638^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4034629 = 145246644 / (1 + 4 + 5 + 2 + 4 + 6 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 145246599 and 145246608.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 2017279 + ... + 2017350.

Almost surely, 2^145246644 is an apocalyptic number.

It is an amenable number.

145246644 is an abundant number, since it is smaller than the sum of its proper divisors (221904686).

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

145246644 is a wasteful number, since it uses less digits than its factorization.

145246644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034639 (or 4034634 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 145246644 is about 12051.8315620490. The cubic root of 145246644 is about 525.6564957377.

The spelling of 145246644 in words is "one hundred forty-five million, two hundred forty-six thousand, six hundred forty-four".