30283840 has 56 divisors (see below), whose sum is σ = 72905112. Its totient is φ = 11980800.

The previous prime is 30283769. The next prime is 30283849. The reversal of 30283840 is 4838203.

It can be written as a sum of positive squares in 4 ways, for example, as 3326976 + 26956864 = 1824^2 + 5192^2 .

It is a super-2 number, since 2×30283840² = 1834221930291200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30283799 and 30283808.

It is not an unprimeable number, because it can be changed into a prime (30283849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31852 + ... + 32788.

It is an arithmetic number, because the mean of its divisors is an integer number (1301877).

Almost surely, 2^30283840 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 30283840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36452556).

30283840 is an abundant number, since it is smaller than the sum of its proper divisors (42621272).

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

30283840 is a wasteful number, since it uses less digits than its factorization.

30283840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 30283840 is about 5503.0755037524. The cubic root of 30283840 is about 311.7001282701.

The spelling of 30283840 in words is "thirty million, two hundred eighty-three thousand, eight hundred forty".