30420500 has 48 divisors (see below), whose sum is σ = 72491328. Its totient is φ = 11060000.

The previous prime is 30420491. The next prime is 30420521. The reversal of 30420500 is 502403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2735 + ... + 8265.

It is an arithmetic number, because the mean of its divisors is an integer number (1510236).

Almost surely, 2^30420500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30420500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36245664).

30420500 is an abundant number, since it is smaller than the sum of its proper divisors (42070828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30420500 is a wasteful number, since it uses less digits than its factorization.

30420500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561 (or 5549 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 30420500 is about 5515.4782204266. The cubic root of 30420500 is about 312.1682880195.

Adding to 30420500 its reverse (502403), we get a palindrome (30922903).

It can be divided in two parts, 30420 and 500, that multiplied together give a square (15210000 = 3900²).

The spelling of 30420500 in words is "thirty million, four hundred twenty thousand, five hundred".