40015945 has 8 divisors (see below), whose sum is σ = 48090240. Its totient is φ = 31965360.

The previous prime is 40015903. The next prime is 40015961. The reversal of 40015945 is 54951004.

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

It is a de Polignac number, because none of the positive numbers 2^k-40015945 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, 1971 + ... + 9160.

It is an arithmetic number, because the mean of its divisors is an integer number (6011280).

Almost surely, 2^40015945 is an apocalyptic number.

It is an amenable number.

40015945 is a deficient number, since it is larger than the sum of its proper divisors (8074295).

40015945 is a wasteful number, since it uses less digits than its factorization.

40015945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11855.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 40015945 is about 6325.8157576711. The cubic root of 40015945 is about 342.0406259093.

Adding to 40015945 its reverse (54951004), we get a palindrome (94966949).

The spelling of 40015945 in words is "forty million, fifteen thousand, nine hundred forty-five".