30218040 has 48 divisors (see below), whose sum is σ = 98209800. Its totient is φ = 8058048.

The previous prime is 30218033. The next prime is 30218047. The reversal of 30218040 is 4081203.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30218033) and next prime (30218047).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30218047) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 41610 + ... + 42329.

Almost surely, 2^30218040 is an apocalyptic number.

30218040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30218040 is an abundant number, since it is smaller than the sum of its proper divisors (67991760).

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

30218040 is a wasteful number, since it uses less digits than its factorization.

30218040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83956 (or 83949 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30218040 is about 5497.0937776247. The cubic root of 30218040 is about 311.4742130532.

Adding to 30218040 its reverse (4081203), we get a palindrome (34299243).

The spelling of 30218040 in words is "thirty million, two hundred eighteen thousand, forty".