40447645 has 16 divisors (see below), whose sum is σ = 55744128. Its totient is φ = 27599040.

The previous prime is 40447633. The next prime is 40447651. The reversal of 40447645 is 54674404.

It is not a de Polignac number, because 40447645 - 2¹³ = 40439453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40447645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4647 + ... + 10123.

It is an arithmetic number, because the mean of its divisors is an integer number (3484008).

Almost surely, 2^40447645 is an apocalyptic number.

It is an amenable number.

40447645 is a deficient number, since it is larger than the sum of its proper divisors (15296483).

40447645 is a wasteful number, since it uses less digits than its factorization.

40447645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 40447645 is about 6359.8463031743. The cubic root of 40447645 is about 343.2662299079.

The spelling of 40447645 in words is "forty million, four hundred forty-seven thousand, six hundred forty-five".