145889444 has 12 divisors (see below), whose sum is σ = 270324684. Its totient is φ = 68653824.

The previous prime is 145889417. The next prime is 145889479. The reversal of 145889444 is 444988541.

It can be written as a sum of positive squares in 2 ways, for example, as 92891044 + 52998400 = 9638^2 + 7280^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072649 + ... + 1072784.

It is an arithmetic number, because the mean of its divisors is an integer number (22527057).

Almost surely, 2^145889444 is an apocalyptic number.

It is an amenable number.

145889444 is a deficient number, since it is larger than the sum of its proper divisors (124435240).

145889444 is a wasteful number, since it uses less digits than its factorization.

145889444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145454 (or 2145452 counting only the distinct ones).

The product of its digits is 737280, while the sum is 47.

The square root of 145889444 is about 12078.4702673807. The cubic root of 145889444 is about 526.4307987957.

The spelling of 145889444 in words is "one hundred forty-five million, eight hundred eighty-nine thousand, four hundred forty-four".