30882640 has 40 divisors (see below), whose sum is σ = 72682848. Its totient is φ = 12201600.

The previous prime is 30882637. The next prime is 30882641. The reversal of 30882640 is 4628803.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30882641) 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, 4315 + ... + 8965.

Almost surely, 2^30882640 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 30882640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36341424).

30882640 is an abundant number, since it is smaller than the sum of its proper divisors (41800208).

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

30882640 is a wasteful number, since it uses less digits than its factorization.

30882640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747 (or 4741 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 30882640 is about 5557.2151299009. The cubic root of 30882640 is about 313.7411419540.

The spelling of 30882640 in words is "thirty million, eight hundred eighty-two thousand, six hundred forty".