40384429 has 2 divisors, whose sum is σ = 40384430. Its totient is φ = 40384428.

The previous prime is 40384423. The next prime is 40384447. The reversal of 40384429 is 92448304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22108804 + 18275625 = 4702^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 40384429 - 2²⁵ = 6829997 is a prime.

It is equal to p_2455666 and since 40384429 and 2455666 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40384394 and 40384403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40384423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20192214 + 20192215.

It is an arithmetic number, because the mean of its divisors is an integer number (20192215).

Almost surely, 2^40384429 is an apocalyptic number.

It is an amenable number.

40384429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40384429 is an equidigital number, since it uses as much as digits as its factorization.

40384429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 40384429 is about 6354.8744283424. The cubic root of 40384429 is about 343.0873053350.

The spelling of 40384429 in words is "forty million, three hundred eighty-four thousand, four hundred twenty-nine".