41990405 has 8 divisors (see below), whose sum is σ = 52126200. Its totient is φ = 32433856.

The previous prime is 41990401. The next prime is 41990407. The reversal of 41990405 is 50409914.

It can be written as a sum of positive squares in 4 ways, for example, as 14122564 + 27867841 = 3758^2 + 5279^2 .

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 41990405 - 2² = 41990401 is a prime.

It is a super-2 number, since 2×41990405² = 3526388224128050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41990401) 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, 144650 + ... + 144939.

It is an arithmetic number, because the mean of its divisors is an integer number (6515775).

Almost surely, 2^41990405 is an apocalyptic number.

It is an amenable number.

41990405 is a deficient number, since it is larger than the sum of its proper divisors (10135795).

41990405 is a wasteful number, since it uses less digits than its factorization.

41990405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289623.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 41990405 is about 6480.0003858025. Note that the first 3 decimals coincide. The cubic root of 41990405 is about 347.5761922539.

The spelling of 41990405 in words is "forty-one million, nine hundred ninety thousand, four hundred five".