40090345 has 4 divisors (see below), whose sum is σ = 48108420. Its totient is φ = 32072272.

The previous prime is 40090291. The next prime is 40090397. The reversal of 40090345 is 54309004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11478544 + 28611801 = 3388^2 + 5349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40090345 is a prime.

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, 4009030 + ... + 4009039.

It is an arithmetic number, because the mean of its divisors is an integer number (12027105).

Almost surely, 2^40090345 is an apocalyptic number.

It is an amenable number.

40090345 is a deficient number, since it is larger than the sum of its proper divisors (8018075).

40090345 is an equidigital number, since it uses as much as digits as its factorization.

40090345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8018074.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40090345 is about 6331.6936912646. The cubic root of 40090345 is about 342.2524753564.

Adding to 40090345 its reverse (54309004), we get a palindrome (94399349).

The spelling of 40090345 in words is "forty million, ninety thousand, three hundred forty-five".