30389742 has 40 divisors (see below), whose sum is σ = 68607000. Its totient is φ = 10053936.

The previous prime is 30389741. The next prime is 30389747. The reversal of 30389742 is 24798303.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30389697 and 30389706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30389741) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23509 + ... + 24767.

It is an arithmetic number, because the mean of its divisors is an integer number (1715175).

Almost surely, 2^30389742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30389742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34303500).

30389742 is an abundant number, since it is smaller than the sum of its proper divisors (38217258).

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

30389742 is a wasteful number, since it uses less digits than its factorization.

30389742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 30389742 is about 5512.6891804273. The cubic root of 30389742 is about 312.0630419948.

The spelling of 30389742 in words is "thirty million, three hundred eighty-nine thousand, seven hundred forty-two".