43628491 has 2 divisors, whose sum is σ = 43628492. Its totient is φ = 43628490.

The previous prime is 43628479. The next prime is 43628521. The reversal of 43628491 is 19482634.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43628491 - 2⁷ = 43628363 is a prime.

It is a super-3 number, since 3×43628491³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43628491.

It is not a weakly prime, because it can be changed into another prime (43628791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21814245 + 21814246.

It is an arithmetic number, because the mean of its divisors is an integer number (21814246).

Almost surely, 2^43628491 is an apocalyptic number.

43628491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43628491 is an equidigital number, since it uses as much as digits as its factorization.

43628491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 43628491 is about 6605.1866741221. The cubic root of 43628491 is about 352.0384207158.

The spelling of 43628491 in words is "forty-three million, six hundred twenty-eight thousand, four hundred ninety-one".