4640729 has 4 divisors (see below), whose sum is σ = 4664484. Its totient is φ = 4616976.

The previous prime is 4640723. The next prime is 4640737. The reversal of 4640729 is 9270464.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 2544025 = 1448^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4640729 is a prime.

It is a super-3 number, since 3×4640729³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4640695 and 4640704.

It is not an unprimeable number, because it can be changed into a prime (4640723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11582 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (1166121).

Almost surely, 2^4640729 is an apocalyptic number.

It is an amenable number.

4640729 is a deficient number, since it is larger than the sum of its proper divisors (23755).

4640729 is a wasteful number, since it uses less digits than its factorization.

4640729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23754.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 4640729 is about 2154.2351310848. The cubic root of 4640729 is about 166.7997528113.

The spelling of 4640729 in words is "four million, six hundred forty thousand, seven hundred twenty-nine".