30500280 has 128 divisors (see below), whose sum is σ = 105062400. Its totient is φ = 7862400.

The previous prime is 30500279. The next prime is 30500293. The reversal of 30500280 is 8200503.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 33025 + ... + 33935.

It is an arithmetic number, because the mean of its divisors is an integer number (820800).

Almost surely, 2^30500280 is an apocalyptic number.

30500280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30500280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52531200).

30500280 is an abundant number, since it is smaller than the sum of its proper divisors (74562120).

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

30500280 is a wasteful number, since it uses less digits than its factorization.

30500280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30500280 is about 5522.7058585443. The cubic root of 30500280 is about 312.4409445739.

Adding to 30500280 its reverse (8200503), we get a palindrome (38700783).

The spelling of 30500280 in words is "thirty million, five hundred thousand, two hundred eighty".