29820730 has 16 divisors (see below), whose sum is σ = 53740584. Its totient is φ = 11914240.

The previous prime is 29820727. The next prime is 29820731. The reversal of 29820730 is 3702892.

It can be written as a sum of positive squares in 4 ways, for example, as 26409321 + 3411409 = 5139^2 + 1847^2 .

It is a junction number, because it is equal to n+sod(n) for n = 29820692 and 29820701.

It is not an unprimeable number, because it can be changed into a prime (29820731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13290 + ... + 15370.

Almost surely, 2^29820730 is an apocalyptic number.

29820730 is a deficient number, since it is larger than the sum of its proper divisors (23919854).

29820730 is a wasteful number, since it uses less digits than its factorization.

29820730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 29820730 is about 5460.8360165821. The cubic root of 29820730 is about 310.1030874637.

The spelling of 29820730 in words is "twenty-nine million, eight hundred twenty thousand, seven hundred thirty".