30388380 has 96 divisors (see below), whose sum is σ = 95171328. Its totient is φ = 7180800.

The previous prime is 30388361. The next prime is 30388409. The reversal of 30388380 is 8388303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26499 + ... + 27621.

It is an arithmetic number, because the mean of its divisors is an integer number (991368).

Almost surely, 2^30388380 is an apocalyptic number.

30388380 is a gapful number since it is divisible by the number (30) 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 30388380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47585664).

30388380 is an abundant number, since it is smaller than the sum of its proper divisors (64782948).

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

30388380 is a wasteful number, since it uses less digits than its factorization.

30388380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 30388380 is about 5512.5656458676. The cubic root of 30388380 is about 312.0583799368.

The spelling of 30388380 in words is "thirty million, three hundred eighty-eight thousand, three hundred eighty".