145668744 has 96 divisors (see below), whose sum is σ = 447283200. Its totient is φ = 42456960.

The previous prime is 145668739. The next prime is 145668773. The reversal of 145668744 is 447866541.

145668744 is a `hidden beast` number, since 1 + 4 + 566 + 87 + 4 + 4 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 145668744.

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 23 ways as a sum of consecutive naturals, for example, 13689 + ... + 21879.

It is an arithmetic number, because the mean of its divisors is an integer number (4659200).

Almost surely, 2^145668744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145668744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223641600).

145668744 is an abundant number, since it is smaller than the sum of its proper divisors (301614456).

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

145668744 is a wasteful number, since it uses less digits than its factorization.

145668744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8235 (or 8228 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 145668744 is about 12069.3307188096. The cubic root of 145668744 is about 526.1652051829.

The spelling of 145668744 in words is "one hundred forty-five million, six hundred sixty-eight thousand, seven hundred forty-four".