30643680 has 48 divisors (see below), whose sum is σ = 96529104. Its totient is φ = 8171520.

The previous prime is 30643667. The next prime is 30643693. The reversal of 30643680 is 8634603.

It is an interprime number because it is at equal distance from previous prime (30643667) and next prime (30643693).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 31441 + ... + 32400.

It is an arithmetic number, because the mean of its divisors is an integer number (2011023).

Almost surely, 2^30643680 is an apocalyptic number.

30643680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30643680 is an abundant number, since it is smaller than the sum of its proper divisors (65885424).

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

30643680 is a wasteful number, since it uses less digits than its factorization.

30643680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63859 (or 63851 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 30643680 is about 5535.6734007707. The cubic root of 30643680 is about 312.9298362329.

The spelling of 30643680 in words is "thirty million, six hundred forty-three thousand, six hundred eighty".