40690261 has 8 divisors (see below), whose sum is σ = 41133600. Its totient is φ = 40249488.

The previous prime is 40690249. The next prime is 40690271. The reversal of 40690261 is 16209604.

40690261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40690261 - 2¹⁵ = 40657493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40690201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51310 + ... + 52096.

It is an arithmetic number, because the mean of its divisors is an integer number (5141700).

Almost surely, 2^40690261 is an apocalyptic number.

It is an amenable number.

40690261 is a deficient number, since it is larger than the sum of its proper divisors (443339).

40690261 is a wasteful number, since it uses less digits than its factorization.

40690261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40690261 is about 6378.8918316585. The cubic root of 40690261 is about 343.9511969932.

Adding to 40690261 its reverse (16209604), we get a palindrome (56899865).

The spelling of 40690261 in words is "forty million, six hundred ninety thousand, two hundred sixty-one".