30520605 has 16 divisors (see below), whose sum is σ = 50025024. Its totient is φ = 15880320.

The previous prime is 30520601. The next prime is 30520613. The reversal of 30520605 is 50602503.

It is not a de Polignac number, because 30520605 - 2² = 30520601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30520601) 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, 24199 + ... + 25428.

It is an arithmetic number, because the mean of its divisors is an integer number (3126564).

Almost surely, 2^30520605 is an apocalyptic number.

It is an amenable number.

30520605 is a deficient number, since it is larger than the sum of its proper divisors (19504419).

30520605 is a wasteful number, since it uses less digits than its factorization.

30520605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49676.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 30520605 is about 5524.5456826784. The cubic root of 30520605 is about 312.5103313918.

It can be divided in two parts, 30520 and 605, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 30520605 in words is "thirty million, five hundred twenty thousand, six hundred five".