30284440 has 16 divisors (see below), whose sum is σ = 68140080. Its totient is φ = 12113760.

The previous prime is 30284431. The next prime is 30284447. The reversal of 30284440 is 4448203.

It is a super-2 number, since 2×30284440² = 1834294612227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30284447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378516 + ... + 378595.

It is an arithmetic number, because the mean of its divisors is an integer number (4258755).

Almost surely, 2^30284440 is an apocalyptic number.

It is an amenable number.

30284440 is an abundant number, since it is smaller than the sum of its proper divisors (37855640).

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

30284440 is a wasteful number, since it uses less digits than its factorization.

30284440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757122 (or 757118 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 30284440 is about 5503.1300184531. The cubic root of 30284440 is about 311.7021867810.

The spelling of 30284440 in words is "thirty million, two hundred eighty-four thousand, four hundred forty".