8440045 has 8 divisors (see below), whose sum is σ = 10162296. Its totient is φ = 6729216.

The previous prime is 8440043. The next prime is 8440063. The reversal of 8440045 is 5400448.

It can be written as a sum of positive squares in 4 ways, for example, as 527076 + 7912969 = 726^2 + 2813^2 .

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 8440045 - 2¹ = 8440043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132 + ... + 4261.

It is an arithmetic number, because the mean of its divisors is an integer number (1270287).

Almost surely, 2^8440045 is an apocalyptic number.

It is an amenable number.

8440045 is a deficient number, since it is larger than the sum of its proper divisors (1722251).

8440045 is a wasteful number, since it uses less digits than its factorization.

8440045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 8440045 is about 2905.1755540759. The cubic root of 8440045 is about 203.6017879065.

The spelling of 8440045 in words is "eight million, four hundred forty thousand, forty-five".