30397644 has 54 divisors (see below), whose sum is σ = 81130140. Its totient is φ = 9595152.

The previous prime is 30397643. The next prime is 30397681. The reversal of 30397644 is 44679303.

30397644 is a `hidden beast` number, since 3 + 0 + 3 + 9 + 7 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30397599 and 30397608.

It is not an unprimeable number, because it can be changed into a prime (30397643) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11827 + ... + 14165.

It is an arithmetic number, because the mean of its divisors is an integer number (1502410).

Almost surely, 2^30397644 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 30397644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40565070).

30397644 is an abundant number, since it is smaller than the sum of its proper divisors (50732496).

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

30397644 is a wasteful number, since it uses less digits than its factorization.

30397644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 30397644 is about 5513.4058439407. The cubic root of 30397644 is about 312.0900873977.

The spelling of 30397644 in words is "thirty million, three hundred ninety-seven thousand, six hundred forty-four".