30247640 has 16 divisors (see below), whose sum is σ = 68057280. Its totient is φ = 12099040.

The previous prime is 30247631. The next prime is 30247663. The reversal of 30247640 is 4674203.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 378056 + ... + 378135.

It is an arithmetic number, because the mean of its divisors is an integer number (4253580).

Almost surely, 2^30247640 is an apocalyptic number.

It is an amenable number.

30247640 is an abundant number, since it is smaller than the sum of its proper divisors (37809640).

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

30247640 is a wasteful number, since it uses less digits than its factorization.

30247640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756202 (or 756198 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 30247640 is about 5499.7854503608. The cubic root of 30247640 is about 311.5758811075.

The spelling of 30247640 in words is "thirty million, two hundred forty-seven thousand, six hundred forty".