308429 has 6 divisors (see below), whose sum is σ = 339150. Its totient is φ = 280280.

The previous prime is 308423. The next prime is 308437. The reversal of 308429 is 924803.

It can be written as a sum of positive squares in only one way, i.e., 302500 + 5929 = 550^2 + 77^2 .

It is a de Polignac number, because none of the positive numbers 2^k-308429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 308398 and 308407.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308429.

It is not an unprimeable number, because it can be changed into a prime (308423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1154 + ... + 1395.

It is an arithmetic number, because the mean of its divisors is an integer number (56525).

2³⁰⁸⁴²⁹ is an apocalyptic number.

It is an amenable number.

308429 is a deficient number, since it is larger than the sum of its proper divisors (30721).

308429 is a wasteful number, since it uses less digits than its factorization.

308429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 308429 is about 555.3638447000. The cubic root of 308429 is about 67.5644742901.

It can be divided in two parts, 3084 and 29, that added together give a palindrome (3113).

The spelling of 308429 in words is "three hundred eight thousand, four hundred twenty-nine".