40669385 has 4 divisors (see below), whose sum is σ = 48803268. Its totient is φ = 32535504.

The previous prime is 40669381. The next prime is 40669393. The reversal of 40669385 is 58396604.

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 9174841 + 31494544 = 3029^2 + 5612^2 .

It is a cyclic number.

It is not a de Polignac number, because 40669385 - 2² = 40669381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40669381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4066934 + ... + 4066943.

It is an arithmetic number, because the mean of its divisors is an integer number (12200817).

Almost surely, 2^40669385 is an apocalyptic number.

It is an amenable number.

40669385 is a deficient number, since it is larger than the sum of its proper divisors (8133883).

40669385 is an equidigital number, since it uses as much as digits as its factorization.

40669385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8133882.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 40669385 is about 6377.2552873474. The cubic root of 40669385 is about 343.8923659338.

The spelling of 40669385 in words is "forty million, six hundred sixty-nine thousand, three hundred eighty-five".