40404261 has 8 divisors (see below), whose sum is σ = 56214720. Its totient is φ = 25764992.

The previous prime is 40404239. The next prime is 40404269. The reversal of 40404261 is 16240404.

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 40404261 - 2⁹ = 40403749 is a prime.

It is a super-2 number, since 2×40404261² = 3265008613912242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292716 + ... + 292853.

It is an arithmetic number, because the mean of its divisors is an integer number (7026840).

Almost surely, 2^40404261 is an apocalyptic number.

It is an amenable number.

40404261 is a deficient number, since it is larger than the sum of its proper divisors (15810459).

40404261 is a wasteful number, since it uses less digits than its factorization.

40404261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585595.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40404261 is about 6356.4346138382. The cubic root of 40404261 is about 343.1434572903.

Adding to 40404261 its reverse (16240404), we get a palindrome (56644665).

The spelling of 40404261 in words is "forty million, four hundred four thousand, two hundred sixty-one".