438213429 has 8 divisors (see below), whose sum is σ = 649205120. Its totient is φ = 292142268.

The previous prime is 438213409. The next prime is 438213439. The reversal of 438213429 is 924312834.

438213429 is a `hidden beast` number, since 438 + 213 + 4 + 2 + 9 = 666.

It is not a de Polignac number, because 438213429 - 2⁸ = 438213173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438213393 and 438213402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438213409) 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, 8115037 + ... + 8115090.

It is an arithmetic number, because the mean of its divisors is an integer number (81150640).

Almost surely, 2^438213429 is an apocalyptic number.

It is an amenable number.

438213429 is a deficient number, since it is larger than the sum of its proper divisors (210991691).

438213429 is a wasteful number, since it uses less digits than its factorization.

438213429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16230136 (or 16230130 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 438213429 is about 20933.5479314903. The cubic root of 438213429 is about 759.5596647071.

The spelling of 438213429 in words is "four hundred thirty-eight million, two hundred thirteen thousand, four hundred twenty-nine".