30072840 has 64 divisors (see below), whose sum is σ = 103109760. Its totient is φ = 6873600.

The previous prime is 30072827. The next prime is 30072853. The reversal of 30072840 is 4827003.

It is an interprime number because it is at equal distance from previous prime (30072827) and next prime (30072853).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 30072840.

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, 17061 + ... + 18740.

It is an arithmetic number, because the mean of its divisors is an integer number (1611090).

Almost surely, 2^30072840 is an apocalyptic number.

30072840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30072840 is an abundant number, since it is smaller than the sum of its proper divisors (73036920).

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

30072840 is a wasteful number, since it uses less digits than its factorization.

30072840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35822 (or 35818 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 30072840 is about 5483.8708956357. The cubic root of 30072840 is about 310.9745260235.

Adding to 30072840 its reverse (4827003), we get a palindrome (34899843).

The spelling of 30072840 in words is "thirty million, seventy-two thousand, eight hundred forty".