30789936 has 80 divisors (see below), whose sum is σ = 89041920. Its totient is φ = 10186560.

The previous prime is 30789887. The next prime is 30789943. The reversal of 30789936 is 63998703.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30789891 and 30789900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113481 + ... + 113751.

It is an arithmetic number, because the mean of its divisors is an integer number (1113024).

Almost surely, 2^30789936 is an apocalyptic number.

30789936 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 30789936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44520960).

30789936 is an abundant number, since it is smaller than the sum of its proper divisors (58251984).

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

30789936 is a wasteful number, since it uses less digits than its factorization.

30789936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 30789936 is about 5548.8679926630. The cubic root of 30789936 is about 313.4268962578.

The spelling of 30789936 in words is "thirty million, seven hundred eighty-nine thousand, nine hundred thirty-six".