30529905 has 16 divisors (see below), whose sum is σ = 55826304. Its totient is φ = 13956480.

The previous prime is 30529879. The next prime is 30529907. The reversal of 30529905 is 50992503.

It is not a de Polignac number, because 30529905 - 2⁹ = 30529393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30529907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145276 + ... + 145485.

It is an arithmetic number, because the mean of its divisors is an integer number (3489144).

Almost surely, 2^30529905 is an apocalyptic number.

30529905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30529905 is a deficient number, since it is larger than the sum of its proper divisors (25296399).

30529905 is a wasteful number, since it uses less digits than its factorization.

30529905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290776.

The product of its (nonzero) digits is 12150, while the sum is 33.

The square root of 30529905 is about 5525.3873167408. The cubic root of 30529905 is about 312.5420700694.

It can be divided in two parts, 30 and 529905, that added together give a triangular number (529935 = T₁₀₂₉).

The spelling of 30529905 in words is "thirty million, five hundred twenty-nine thousand, nine hundred five".