40189445 has 8 divisors (see below), whose sum is σ = 51064344. Its totient is φ = 30260224.

The previous prime is 40189439. The next prime is 40189483. The reversal of 40189445 is 54498104.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9375844 + 30813601 = 3062^2 + 5551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40189445 - 2¹⁸ = 39927301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236324 + ... + 236493.

It is an arithmetic number, because the mean of its divisors is an integer number (6383043).

Almost surely, 2^40189445 is an apocalyptic number.

It is an amenable number.

40189445 is a deficient number, since it is larger than the sum of its proper divisors (10874899).

40189445 is a wasteful number, since it uses less digits than its factorization.

40189445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472839.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 40189445 is about 6339.5145713217. The cubic root of 40189445 is about 342.5342498649.

The spelling of 40189445 in words is "forty million, one hundred eighty-nine thousand, four hundred forty-five".