40347145 has 8 divisors (see below), whose sum is σ = 48452040. Its totient is φ = 32254080.

The previous prime is 40347143. The next prime is 40347163. The reversal of 40347145 is 54174304.

40347145 = 4491² + 4492².

It can be written as a sum of positive squares in 4 ways, for example, as 20178064 + 20169081 = 4492^2 + 4491^2 .

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

It is not a de Polignac number, because 40347145 - 2¹ = 40347143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40347143) 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, 8821 + ... + 12589.

It is an arithmetic number, because the mean of its divisors is an integer number (6056505).

Almost surely, 2^40347145 is an apocalyptic number.

40347145 is the 4492-nd centered square number.

It is an amenable number.

40347145 is a deficient number, since it is larger than the sum of its proper divisors (8104895).

40347145 is a wasteful number, since it uses less digits than its factorization.

40347145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5915.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 40347145 is about 6351.9402547568. The cubic root of 40347145 is about 342.9816903247.

The spelling of 40347145 in words is "forty million, three hundred forty-seven thousand, one hundred forty-five".