30284640 has 72 divisors (see below), whose sum is σ = 103351248. Its totient is φ = 8075520.

The previous prime is 30284627. The next prime is 30284659. The reversal of 30284640 is 4648203.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9076 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (1435434).

Almost surely, 2^30284640 is an apocalyptic number.

30284640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30284640 is an abundant number, since it is smaller than the sum of its proper divisors (73066608).

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

30284640 is a wasteful number, since it uses less digits than its factorization.

30284640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052 (or 21041 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 30284640 is about 5503.1481899000. The cubic root of 30284640 is about 311.7028729453.

The spelling of 30284640 in words is "thirty million, two hundred eighty-four thousand, six hundred forty".