40889231 has 2 divisors, whose sum is σ = 40889232. Its totient is φ = 40889230.

The previous prime is 40889227. The next prime is 40889243. The reversal of 40889231 is 13298804.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40889231 - 2² = 40889227 is a prime.

It is a super-2 number, since 2×40889231² = 3343858423542722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40889191 and 40889200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40889281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20444615 + 20444616.

It is an arithmetic number, because the mean of its divisors is an integer number (20444616).

Almost surely, 2^40889231 is an apocalyptic number.

40889231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40889231 is an equidigital number, since it uses as much as digits as its factorization.

40889231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40889231 is about 6394.4687816894. The cubic root of 40889231 is about 344.5109109757.

It can be divided in two parts, 4088 and 9231, that multiplied together give a triangular number (37736328 = T₈₆₈₇).

The spelling of 40889231 in words is "forty million, eight hundred eighty-nine thousand, two hundred thirty-one".