40002745 has 8 divisors (see below), whose sum is σ = 49658760. Its totient is φ = 30898560.

The previous prime is 40002731. The next prime is 40002779. The reversal of 40002745 is 54720004.

It can be written as a sum of positive squares in 4 ways, for example, as 16451136 + 23551609 = 4056^2 + 4853^2 .

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

It is not a de Polignac number, because 40002745 - 2⁹ = 40002233 is a prime.

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, 137796 + ... + 138085.

It is an arithmetic number, because the mean of its divisors is an integer number (6207345).

Almost surely, 2^40002745 is an apocalyptic number.

It is an amenable number.

40002745 is a deficient number, since it is larger than the sum of its proper divisors (9656015).

40002745 is a wasteful number, since it uses less digits than its factorization.

40002745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275915.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 40002745 is about 6324.7723279182. The cubic root of 40002745 is about 342.0030122963.

Adding to 40002745 its reverse (54720004), we get a palindrome (94722749).

The spelling of 40002745 in words is "forty million, two thousand, seven hundred forty-five".