2238729 has 4 divisors (see below), whose sum is σ = 2984976. Its totient is φ = 1492484.

The previous prime is 2238721. The next prime is 2238749. The reversal of 2238729 is 9278322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2238729 - 2³ = 2238721 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 2¹⁴ + 3¹⁰ + 8⁷ + 7³ + 2¹⁶ + 9 .

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2238729.

It is not an unprimeable number, because it can be changed into a prime (2238721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373119 + ... + 373124.

It is an arithmetic number, because the mean of its divisors is an integer number (746244).

2^2238729 is an apocalyptic number.

It is an amenable number.

2238729 is a deficient number, since it is larger than the sum of its proper divisors (746247).

2238729 is an equidigital number, since it uses as much as digits as its factorization.

2238729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746246.

The product of its digits is 12096, while the sum is 33.

The square root of 2238729 is about 1496.2382831621. The cubic root of 2238729 is about 130.8179005512.

The spelling of 2238729 in words is "two million, two hundred thirty-eight thousand, seven hundred twenty-nine".