30220740 has 72 divisors (see below), whose sum is σ = 100009728. Its totient is φ = 7325760.

The previous prime is 30220733. The next prime is 30220741. The reversal of 30220740 is 4702203.

It is a happy number.

It is a super-2 number, since 2×30220740² = 1826586252295200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (30220741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5652 + ... + 9611.

It is an arithmetic number, because the mean of its divisors is an integer number (1389024).

Almost surely, 2^30220740 is an apocalyptic number.

30220740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30220740 is an abundant number, since it is smaller than the sum of its proper divisors (69788988).

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

30220740 is a wasteful number, since it uses less digits than its factorization.

30220740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15289 (or 15284 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 30220740 is about 5497.3393564524. The cubic root of 30220740 is about 311.4834895795.

Adding to 30220740 its reverse (4702203), we get a palindrome (34922943).

The spelling of 30220740 in words is "thirty million, two hundred twenty thousand, seven hundred forty".