4392729 has 12 divisors (see below), whose sum is σ = 6922032. Its totient is φ = 2662200.

The previous prime is 4392719. The next prime is 4392737. The reversal of 4392729 is 9272934.

It is not a de Polignac number, because 4392729 - 2⁸ = 4392473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4392693 and 4392702.

It is not an unprimeable number, because it can be changed into a prime (4392719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22087 + ... + 22284.

It is an arithmetic number, because the mean of its divisors is an integer number (576836).

Almost surely, 2^4392729 is an apocalyptic number.

It is an amenable number.

4392729 is a deficient number, since it is larger than the sum of its proper divisors (2529303).

4392729 is a wasteful number, since it uses less digits than its factorization.

4392729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44388 (or 44385 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 4392729 is about 2095.8838231162. The cubic root of 4392729 is about 163.7739424619.

It can be divided in two parts, 43927 and 29, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 4392729 in words is "four million, three hundred ninety-two thousand, seven hundred twenty-nine".