30889656 has 96 divisors (see below), whose sum is σ = 96445440. Its totient is φ = 8748864.

The previous prime is 30889633. The next prime is 30889673. The reversal of 30889656 is 65698803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83985 + ... + 84351.

It is an arithmetic number, because the mean of its divisors is an integer number (1004640).

Almost surely, 2^30889656 is an apocalyptic number.

30889656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30889656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48222720).

30889656 is an abundant number, since it is smaller than the sum of its proper divisors (65555784).

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

30889656 is a wasteful number, since it uses less digits than its factorization.

30889656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 30889656 is about 5557.8463454831. The cubic root of 30889656 is about 313.7648990031.

The spelling of 30889656 in words is "thirty million, eight hundred eighty-nine thousand, six hundred fifty-six".