40615945 has 4 divisors (see below), whose sum is σ = 48739140. Its totient is φ = 32492752.

The previous prime is 40615933. The next prime is 40615957. The reversal of 40615945 is 54951604.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40615933) and next prime (40615957).

It can be written as a sum of positive squares in 2 ways, for example, as 29909961 + 10705984 = 5469^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 40615945 - 2¹⁹ = 40091657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40615945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4061590 + ... + 4061599.

It is an arithmetic number, because the mean of its divisors is an integer number (12184785).

Almost surely, 2^40615945 is an apocalyptic number.

It is an amenable number.

40615945 is a deficient number, since it is larger than the sum of its proper divisors (8123195).

40615945 is an equidigital number, since it uses as much as digits as its factorization.

40615945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8123194.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 40615945 is about 6373.0640197632. The cubic root of 40615945 is about 343.7416738479.

The spelling of 40615945 in words is "forty million, six hundred fifteen thousand, nine hundred forty-five".